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max-width: inherit; width: calc(100% + 32px); } .post-content table, .post-content td { width: 100%; } #blog-pager { margin: 0; padding: 16px 0; } /** List page tweaks. **/ .list-page .post-original { display: none; } .list-page .post-summary { display: block; } .list-page .comment-container { display: none; } .list-page #blog-pager { padding-top: 0; border: 0; margin-top: -8px; } .list-page .label-footer { display: none; } .list-page #main .post .post-footer { border-bottom: 1px solid #eee; margin: -16px 0 0 0; padding: 0 0 20px 0; } .list-page .post .share { display: none; } /** Detail page tweaks. **/ .detail-page .post-footer .cmt_iframe_holder { padding-top: 32px !important; } .detail-page .label-footer { margin-bottom: 0; } .detail-page #main .post .post-footer { padding-bottom: 0; } .detail-page #comments { display: none; } } [data-about-pullquote], [data-is-preview], [data-about-syndication] { display: none; } </style> <noscript> <style> .loading { visibility: visible }</style> </noscript> <script type='text/javascript'> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); 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//]]> </script> <noscript> <img alt='' height='1' src='https://ad.doubleclick.net/ddm/activity/src=2542116;type=gblog;cat=googl0;ord=1?' width='1'/> </noscript>  <div class='header-outer'> <div class='header-inner'> <div class='section' id='header'><div class='widget Header' data-version='1' id='Header1'> <div class='header-left'> <div class='header-title'> <a class='google-logo' href='https://blog.chromium.org/'> <img alt="Chromium Blog" height="50" src="//1.bp.blogspot.com/-vkF7AFJOwBk/VkQxeAGi1mI/AAAAAAAARYo/57denvsQ8zA/s1600-r/logo_chromium.png"> </a> <a href='/.'> <h2> Chromium Blog </h2> </a> </div> <div class='header-desc'> News and developments from the open source browser project </div> </div> </div></div> </div> </div>  <div class='cols-wrapper loading'> <div class='col-main-wrapper'> <div class='col-main'> <div class='section' id='main'><div class='widget Blog' data-version='1' id='Blog1'> <div class='post' data-id='7212866542901969050' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://blog.chromium.org/2011/06/cloud-coding-and-beyond-web-development.html' itemprop='url' title='Cloud Coding and Beyond: Web Development Apps in the Chrome Web Store'> Cloud Coding and Beyond: Web Development Apps in the Chrome Web Store </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> Wednesday, June 29, 2011 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> When we talk <a href="//www.google.com/chromebook/">Chromebooks</a> with our developer friends, a common reaction we get is “I can see why my [insert-relative-here] would use it, but I need my PC for coding”. Over the last few years, browser-based coding has grown from a research topic to a viable practice. You can already find many development apps on the <a href="chrome.google.com/webstore">Chrome Web Store</a> today. Some are conventional code editors and IDEs, built right into the browser. Others are oriented more around prototyping and design. There are also many tools for project management.<br /><br />First up, IDEs. You can now code, debug, and deploy real programs from the browser. A popular example at Google IO was <a href="https://chrome.google.com/webstore/detail/nbdmccoknlfggadpfkmcpnamfnbkmkcp">Cloud9</a>, an IDE for JavaScript, Python, PHP, and Ruby. Cloud9 uses the HTML5 <a href="http://www.html5rocks.com/en/tutorials/file/filesystem/">FileSystem</a> capability and AppCache to sync files, so you can even code offline. There are many other IDEs in the web store too, such as <a href="https://chrome.google.com/webstore/detail/fgbjpbdfegnodokpoejnbhnblcojccal">Kodingen</a>, <a href="https://chrome.google.com/webstore/detail/lbalghnpcjmlpmmocijdfoghihgocakd">Codey</a>, <a href="https://chrome.google.com/webstore/detail/igajdgcflbbkkjamijjpjadkcncjloog">Akshell</a>, <a href="https://chrome.google.com/webstore/detail/lefigjbiimiemfhjmibbgemkpenelmag?hl=en-US">eXo Cloud IDE</a>, and <a href="https://chrome.google.com/webstore/detail/ncblfioagpfcaojcjlocnakemfjdcdhh">PHPAnywhere</a>.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="//4.bp.blogspot.com/-Yxgj2Xvjros/TgtexL7igpI/AAAAAAAAAFI/-tJaAsfn0tg/s1600/Screen%2Bshot%2B2011-06-29%2Bat%2B9.04.18%2BAM.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5623692758811312786" src="//4.bp.blogspot.com/-Yxgj2Xvjros/TgtexL7igpI/AAAAAAAAAFI/-tJaAsfn0tg/s400/Screen%2Bshot%2B2011-06-29%2Bat%2B9.04.18%2BAM.png" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 187px;"></a><br />It’s not all about coding though. There are also apps focusing on web design, for people who want to make a web page without coding or perhaps experiment with a few concepts early on. Being able to edit and design web pages inside the tool that will display them is a very powerful concept. <a href="https://chrome.google.com/webstore/detail/ofkbkdeephpnfkfkflgigmoojnghgeph">BuildorLite</a> and <a href="https://chrome.google.com/webstore/detail/kapbhjliffabbcegjdkoknpmmohhdepg">BuildorPro</a> let you construct a web page via a graphical user interface, and publish it straight on their servers. <a href="https://chrome.google.com/webstore/detail/kgpklhhhiiafnocfiikcpffkogjkdmki">Handcraft</a> and <a href="https://chrome.google.com/webstore/detail/mglnbanmebacbohplmcogiompoijbhnm?hl=en-US">Mockingbird</a> are two apps aimed at design and prototyping. And if you want a scratchpad to try a few coding experiments, check out <a href="https://chrome.google.com/webstore/detail/hiigmadmngbpbmacbkfngpkjfmmpagfk">JSFiddle</a>.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="//4.bp.blogspot.com/-LcvsmHy888M/TgtfF-jjJ1I/AAAAAAAAAFQ/THGPtkseWhg/s1600/Screen%2Bshot%2B2011-06-29%2Bat%2B10.20.46%2BAM.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5623693115998283602" src="//4.bp.blogspot.com/-LcvsmHy888M/TgtfF-jjJ1I/AAAAAAAAAFQ/THGPtkseWhg/s400/Screen%2Bshot%2B2011-06-29%2Bat%2B10.20.46%2BAM.png" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 184px;"></a><br />Launching software isn’t just about designing and coding your apps; it’s also about managing the entire workflow, from planning release schedules to triaging bug reports. One example is <a href="https://chrome.google.com/webstore/detail/oaianekphgmiibhdffnoimngeolnailp?hl=en-US">GitHub Issues</a>, providing a quick, app-like, way to track project issues. Another is <a href="https://chrome.google.com/webstore/detail/cfjmekcoebepooldamlampienojfjljf?hl=en-US">Launchlist Pro</a>, a checklist you can use to launch your website.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="//2.bp.blogspot.com/-wyOgwft9VyM/TgtfMgpiZdI/AAAAAAAAAFY/M3rVtJgdHls/s1600/Screen%2Bshot%2B2011-06-29%2Bat%2B10.21.01%2BAM.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5623693228229420498" src="//2.bp.blogspot.com/-wyOgwft9VyM/TgtfMgpiZdI/AAAAAAAAAFY/M3rVtJgdHls/s400/Screen%2Bshot%2B2011-06-29%2Bat%2B10.21.01%2BAM.png" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 279px;"></a><br />Chrome aims to bring simplicity, speed, and security to all users, and that includes developers. Being cloud-based means these tools are always up to date, and running inside the browser’s sandbox minimises the security risk to your machine. There’s no complicated install process and the only dependency is Chrome itself, which is automatically kept up to date. Just install the app and get coding.<br /><br />We’re especially excited about what this means for new developers, as programming tools have never been more accessible to everyone. So whether you’re a seasoned veteran or just looking to get started, visit the <a href="http://chrome.google.com/webstore">Chrome Web Store</a> today and build something awesome in your browser!<br /><br /><span class='post-author'>Posted by Michael Mahemoff and Paul Kinlan, Chrome Developer Relations </span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> When we talk <a href="//www.google.com/chromebook/">Chromebooks</a> with our developer friends, a common reaction we get is “I can see why my [insert-relative-here] would use it, but I need my PC for coding”. Over the last few years, browser-based coding has grown from a research topic to a viable practice. You can already find many development apps on the <a href="chrome.google.com/webstore">Chrome Web Store</a> today. Some are conventional code editors and IDEs, built right into the browser. Others are oriented more around prototyping and design. There are also many tools for project management.<br /><br />First up, IDEs. You can now code, debug, and deploy real programs from the browser. A popular example at Google IO was <a href="https://chrome.google.com/webstore/detail/nbdmccoknlfggadpfkmcpnamfnbkmkcp">Cloud9</a>, an IDE for JavaScript, Python, PHP, and Ruby. Cloud9 uses the HTML5 <a href="http://www.html5rocks.com/en/tutorials/file/filesystem/">FileSystem</a> capability and AppCache to sync files, so you can even code offline. There are many other IDEs in the web store too, such as <a href="https://chrome.google.com/webstore/detail/fgbjpbdfegnodokpoejnbhnblcojccal">Kodingen</a>, <a href="https://chrome.google.com/webstore/detail/lbalghnpcjmlpmmocijdfoghihgocakd">Codey</a>, <a href="https://chrome.google.com/webstore/detail/igajdgcflbbkkjamijjpjadkcncjloog">Akshell</a>, <a href="https://chrome.google.com/webstore/detail/lefigjbiimiemfhjmibbgemkpenelmag?hl=en-US">eXo Cloud IDE</a>, and <a href="https://chrome.google.com/webstore/detail/ncblfioagpfcaojcjlocnakemfjdcdhh">PHPAnywhere</a>.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="//4.bp.blogspot.com/-Yxgj2Xvjros/TgtexL7igpI/AAAAAAAAAFI/-tJaAsfn0tg/s1600/Screen%2Bshot%2B2011-06-29%2Bat%2B9.04.18%2BAM.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5623692758811312786" src="//4.bp.blogspot.com/-Yxgj2Xvjros/TgtexL7igpI/AAAAAAAAAFI/-tJaAsfn0tg/s400/Screen%2Bshot%2B2011-06-29%2Bat%2B9.04.18%2BAM.png" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 187px;"></a><br />It’s not all about coding though. There are also apps focusing on web design, for people who want to make a web page without coding or perhaps experiment with a few concepts early on. Being able to edit and design web pages inside the tool that will display them is a very powerful concept. <a href="https://chrome.google.com/webstore/detail/ofkbkdeephpnfkfkflgigmoojnghgeph">BuildorLite</a> and <a href="https://chrome.google.com/webstore/detail/kapbhjliffabbcegjdkoknpmmohhdepg">BuildorPro</a> let you construct a web page via a graphical user interface, and publish it straight on their servers. <a href="https://chrome.google.com/webstore/detail/kgpklhhhiiafnocfiikcpffkogjkdmki">Handcraft</a> and <a href="https://chrome.google.com/webstore/detail/mglnbanmebacbohplmcogiompoijbhnm?hl=en-US">Mockingbird</a> are two apps aimed at design and prototyping. And if you want a scratchpad to try a few coding experiments, check out <a href="https://chrome.google.com/webstore/detail/hiigmadmngbpbmacbkfngpkjfmmpagfk">JSFiddle</a>.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="//4.bp.blogspot.com/-LcvsmHy888M/TgtfF-jjJ1I/AAAAAAAAAFQ/THGPtkseWhg/s1600/Screen%2Bshot%2B2011-06-29%2Bat%2B10.20.46%2BAM.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5623693115998283602" src="//4.bp.blogspot.com/-LcvsmHy888M/TgtfF-jjJ1I/AAAAAAAAAFQ/THGPtkseWhg/s400/Screen%2Bshot%2B2011-06-29%2Bat%2B10.20.46%2BAM.png" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 184px;"></a><br />Launching software isn’t just about designing and coding your apps; it’s also about managing the entire workflow, from planning release schedules to triaging bug reports. One example is <a href="https://chrome.google.com/webstore/detail/oaianekphgmiibhdffnoimngeolnailp?hl=en-US">GitHub Issues</a>, providing a quick, app-like, way to track project issues. Another is <a href="https://chrome.google.com/webstore/detail/cfjmekcoebepooldamlampienojfjljf?hl=en-US">Launchlist Pro</a>, a checklist you can use to launch your website.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="//2.bp.blogspot.com/-wyOgwft9VyM/TgtfMgpiZdI/AAAAAAAAAFY/M3rVtJgdHls/s1600/Screen%2Bshot%2B2011-06-29%2Bat%2B10.21.01%2BAM.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5623693228229420498" src="//2.bp.blogspot.com/-wyOgwft9VyM/TgtfMgpiZdI/AAAAAAAAAFY/M3rVtJgdHls/s400/Screen%2Bshot%2B2011-06-29%2Bat%2B10.21.01%2BAM.png" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 279px;"></a><br />Chrome aims to bring simplicity, speed, and security to all users, and that includes developers. Being cloud-based means these tools are always up to date, and running inside the browser’s sandbox minimises the security risk to your machine. There’s no complicated install process and the only dependency is Chrome itself, which is automatically kept up to date. Just install the app and get coding.<br /><br />We’re especially excited about what this means for new developers, as programming tools have never been more accessible to everyone. So whether you’re a seasoned veteran or just looking to get started, visit the <a href="http://chrome.google.com/webstore">Chrome Web Store</a> today and build something awesome in your browser!<br /><br /><span class='post-author'>Posted by Michael Mahemoff and Paul Kinlan, Chrome Developer Relations </span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> <span class='twitter-custom social-wrapper' data-href='http://twitter.com/share?text=Chromium Blog:Cloud Coding and Beyond: Web Development Apps in the Chrome Web Store&url=https://blog.chromium.org/2011/06/cloud-coding-and-beyond-web-development.html&via=ChromiumDev'> <img alt='Share on Twitter' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_twitter_black_24dp.png' width='24'/> </span> <span class='fb-custom social-wrapper' data-href='https://www.facebook.com/sharer.php?u=https://blog.chromium.org/2011/06/cloud-coding-and-beyond-web-development.html'> <img alt='Share on Facebook' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_facebook_black_24dp.png' width='24'/> </span> </div> <div class='post-footer'> <div class='cmt_iframe_holder' data-href='https://blog.chromium.org/2011/06/cloud-coding-and-beyond-web-development.html' data-viewtype='FILTERED_POSTMOD'></div> <a href='https://plus.google.com/112374322230920073195' rel='author' style='display:none;'> Google </a> <div class='label-footer'> <span class='labels-caption'> Labels: </span> <span class='labels'> <a class='label' href='https://blog.chromium.org/search/label/chrome%20web%20store' rel='tag'> chrome web store </a> </span> </div> </div> </div> <div class='post' data-id='7665878471236738548' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://blog.chromium.org/2011/06/introducing-non-admin-chrome-frame.html' itemprop='url' title='Introducing Non-Admin Chrome Frame'> Introducing Non-Admin Chrome Frame </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> Monday, June 20, 2011 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> We <a href="http://blog.chromium.org/2009/09/introducing-google-chrome-frame.html">released</a> Google Chrome Frame in September 2009 to expand the reach of modern web technologies and help developers take advantage of HTML5's capabilities. Since then, we've seen great adoption of the plug-in by end users and developers. Even more exciting, we’ve heard from developers that Google Chrome Frame is enabling them to create legacy-free apps that are easier to build, maintain, and optimize.<br /><br />However, there was one remaining obstacle to making Chrome Frame accessible to users of older browsers - users needed to have administrative privileges on their machines to install Chrome Frame. At this year's Google I/O we <a href="//www.google.com/events/io/2011/sessions/html5-today-with-google-chrome-frame.html">announced</a> this obstacle has finally been removed.<br /><br />Non-Admin Chrome Frame runs a helper process at startup to assist with loading the Chrome Frame plug-in into Internet Explorer. The helper process is designed to consume almost no system resources while running. Once installed, non-admin users will have the same no-friction experience that admin users of Chrome Frame have today.<br /><br />You can try it yourself by installing the new non-admin version of Chrome Frame <a href="//www.google.com/chromeframe/eula.html?user=true">here</a>. This is now available in our developer channel and is coming to stable channel very soon.<br /><br />For more technical details, please see the <a href="http://www.chromium.org/developers/how-tos/chrome-frame-getting-started/chrome-frame-faq">Chrome Frame FAQ</a>. Please share your feedback in our <a href="https://groups.google.com/group/google-chrome-frame?pli=1">discussion group</a> and if you encounter any bugs while using Chrome Frame, please file them on Chromium's <a href="http://code.google.com/p/chromium/issues/entry?template=ChromeFrame%20Issue">issue tracker</a>. We’ll be working hard to bring Non-Admin Chrome Frame up to the beta and stable channels over the coming weeks. You can help us move this up to stable as quickly as possible by trying out the current release and sending us your feedback!<br /><br /><span class='post-author'>Posted by Robert Shield, Software Engineer </span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> We <a href="http://blog.chromium.org/2009/09/introducing-google-chrome-frame.html">released</a> Google Chrome Frame in September 2009 to expand the reach of modern web technologies and help developers take advantage of HTML5's capabilities. Since then, we've seen great adoption of the plug-in by end users and developers. Even more exciting, we’ve heard from developers that Google Chrome Frame is enabling them to create legacy-free apps that are easier to build, maintain, and optimize.<br /><br />However, there was one remaining obstacle to making Chrome Frame accessible to users of older browsers - users needed to have administrative privileges on their machines to install Chrome Frame. At this year's Google I/O we <a href="//www.google.com/events/io/2011/sessions/html5-today-with-google-chrome-frame.html">announced</a> this obstacle has finally been removed.<br /><br />Non-Admin Chrome Frame runs a helper process at startup to assist with loading the Chrome Frame plug-in into Internet Explorer. The helper process is designed to consume almost no system resources while running. Once installed, non-admin users will have the same no-friction experience that admin users of Chrome Frame have today.<br /><br />You can try it yourself by installing the new non-admin version of Chrome Frame <a href="//www.google.com/chromeframe/eula.html?user=true">here</a>. This is now available in our developer channel and is coming to stable channel very soon.<br /><br />For more technical details, please see the <a href="http://www.chromium.org/developers/how-tos/chrome-frame-getting-started/chrome-frame-faq">Chrome Frame FAQ</a>. Please share your feedback in our <a href="https://groups.google.com/group/google-chrome-frame?pli=1">discussion group</a> and if you encounter any bugs while using Chrome Frame, please file them on Chromium's <a href="http://code.google.com/p/chromium/issues/entry?template=ChromeFrame%20Issue">issue tracker</a>. We’ll be working hard to bring Non-Admin Chrome Frame up to the beta and stable channels over the coming weeks. You can help us move this up to stable as quickly as possible by trying out the current release and sending us your feedback!<br /><br /><span class='post-author'>Posted by Robert Shield, Software Engineer </span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> <span class='twitter-custom social-wrapper' data-href='http://twitter.com/share?text=Chromium Blog:Introducing Non-Admin Chrome Frame&url=https://blog.chromium.org/2011/06/introducing-non-admin-chrome-frame.html&via=ChromiumDev'> <img alt='Share on Twitter' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_twitter_black_24dp.png' width='24'/> </span> <span class='fb-custom social-wrapper' data-href='https://www.facebook.com/sharer.php?u=https://blog.chromium.org/2011/06/introducing-non-admin-chrome-frame.html'> <img alt='Share on Facebook' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_facebook_black_24dp.png' width='24'/> </span> </div> <div class='post-footer'> <div class='cmt_iframe_holder' data-href='https://blog.chromium.org/2011/06/introducing-non-admin-chrome-frame.html' data-viewtype='FILTERED_POSTMOD'></div> <a href='https://plus.google.com/112374322230920073195' rel='author' style='display:none;'> Google </a> <div class='label-footer'> <span class='labels-caption'> Labels: </span> <span class='labels'> <a class='label' href='https://blog.chromium.org/search/label/chromeframe' rel='tag'> chromeframe </a> </span> </div> </div> </div> <div class='post' data-id='5886492252609542755' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://blog.chromium.org/2011/06/testing-chromium-addresssanitizer-fast.html' itemprop='url' title='Testing Chromium: AddressSanitizer, a fast memory error detector.'> Testing Chromium: AddressSanitizer, a fast memory error detector. </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> Wednesday, June 15, 2011 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> <a href="http://valgrind.org/">Valgrind</a> is a great tool for detecting memory errors. We are running many Chromium tests under Valgrind and it has helped us find <a href="http://code.google.com/p/chromium/issues/list?can=1&q=Stability%3DValgrind&colspec=ID+Stars+Pri+Area+Feature+Type+Status+Summary+Modified+Owner+Mstone+OS&x=mstone&y=area&cells=tiles">hundreds of significant bugs</a>. However, when we run binaries under Valgrind, testing becomes at least 10 times slower. This huge slowdown costs us more than just machine time; our trybots and buildbots can’t provide fast feedback and some tests fail due to timeouts.<br /><br />A month ago we released <a href="http://code.google.com/p/address-sanitizer/wiki/AddressSanitizer">AddressSanitizer</a> (aka ASan), a new testing tool. ASan consists of two parts:<br /><ul><li>A compiler which performs instrumentation - currently we use a modified <a href="http://llvm.org/">LLVM</a>/<a href="http://clang.llvm.org/">Clang</a> and we're trying to contribute our code to the core LLVM package.</li><li>A run-time library that replaces <span style="font-family:courier">malloc()</span>, <span style="font-family:courier">free()</span>and friends. </li></ul><br />The custom <span style="font-family:courier">malloc()</span> allocates more bytes than requested and “poisons” the redzones around the region returned to the caller. The custom <span style="font-family:courier">free()</span> “poisons” the entire region and puts it into quarantine for some time. The instrumented code produced by the compiler checks if the address being accessed is poisoned and if so, reports an error. The compiler also inserts poisoned redzones between objects on stack to catch stack buffer overrun/underrun.<br /><br />ASan helps us find a subset of bugs that are detectable by Valgrind like heap buffer overrun/underrun (out-of-bounds access) and “Use after free.” It can also detect bugs that Valgrind can not find, such as stack buffer overrun/underrun. Last month alone, ASan helped us find more than 20 bugs in Chromium including some that could have potentially led to security vulnerabilities.<br /><br />What makes ASan even more powerful than other comparable tools is its speed. On <a href="http://www.spec.org/cpu2006/">SPEC CPU2006</a> benchmarks the <a href="http://code.google.com/p/address-sanitizer/wiki/PerformanceNumbers">average slowdown</a> is about 2x. On Chromium’s “browser_tests”, the slowdown is about 20%. If you are curious to learn why ASan is faster than comparable tools read this <a href="http://code.google.com/p/address-sanitizer/wiki/AddressSanitizerAlgorithm">article</a>.<br /><br />Today ASan works only on Linux (x86 and x86_64) and ChromiumOS, but we're planning to port it to other platforms in the near future. In the coming months we also plan to setup various ASan buildbots and trybots for Chromium.<br /><br />The <a href="http://code.google.com/p/address-sanitizer/wiki/AddressSanitizer">AddressSanitizer home page</a> has the instructions for running it with your favorite project outside of Chromium. If you are working on Chromium, refer to this <a href="https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer">page</a> for instructions. If you have any questions or suggestions, feel free to contact address-sanitizer@googlegroups.com<br /><br /><span class="post-author">Posted by Kostya Serebryany, Software Engineer </span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> <a href="http://valgrind.org/">Valgrind</a> is a great tool for detecting memory errors. We are running many Chromium tests under Valgrind and it has helped us find <a href="http://code.google.com/p/chromium/issues/list?can=1&q=Stability%3DValgrind&colspec=ID+Stars+Pri+Area+Feature+Type+Status+Summary+Modified+Owner+Mstone+OS&x=mstone&y=area&cells=tiles">hundreds of significant bugs</a>. However, when we run binaries under Valgrind, testing becomes at least 10 times slower. This huge slowdown costs us more than just machine time; our trybots and buildbots can’t provide fast feedback and some tests fail due to timeouts.<br /><br />A month ago we released <a href="http://code.google.com/p/address-sanitizer/wiki/AddressSanitizer">AddressSanitizer</a> (aka ASan), a new testing tool. ASan consists of two parts:<br /><ul><li>A compiler which performs instrumentation - currently we use a modified <a href="http://llvm.org/">LLVM</a>/<a href="http://clang.llvm.org/">Clang</a> and we're trying to contribute our code to the core LLVM package.</li><li>A run-time library that replaces <span style="font-family:courier">malloc()</span>, <span style="font-family:courier">free()</span>and friends. </li></ul><br />The custom <span style="font-family:courier">malloc()</span> allocates more bytes than requested and “poisons” the redzones around the region returned to the caller. The custom <span style="font-family:courier">free()</span> “poisons” the entire region and puts it into quarantine for some time. The instrumented code produced by the compiler checks if the address being accessed is poisoned and if so, reports an error. The compiler also inserts poisoned redzones between objects on stack to catch stack buffer overrun/underrun.<br /><br />ASan helps us find a subset of bugs that are detectable by Valgrind like heap buffer overrun/underrun (out-of-bounds access) and “Use after free.” It can also detect bugs that Valgrind can not find, such as stack buffer overrun/underrun. Last month alone, ASan helped us find more than 20 bugs in Chromium including some that could have potentially led to security vulnerabilities.<br /><br />What makes ASan even more powerful than other comparable tools is its speed. On <a href="http://www.spec.org/cpu2006/">SPEC CPU2006</a> benchmarks the <a href="http://code.google.com/p/address-sanitizer/wiki/PerformanceNumbers">average slowdown</a> is about 2x. On Chromium’s “browser_tests”, the slowdown is about 20%. If you are curious to learn why ASan is faster than comparable tools read this <a href="http://code.google.com/p/address-sanitizer/wiki/AddressSanitizerAlgorithm">article</a>.<br /><br />Today ASan works only on Linux (x86 and x86_64) and ChromiumOS, but we're planning to port it to other platforms in the near future. In the coming months we also plan to setup various ASan buildbots and trybots for Chromium.<br /><br />The <a href="http://code.google.com/p/address-sanitizer/wiki/AddressSanitizer">AddressSanitizer home page</a> has the instructions for running it with your favorite project outside of Chromium. If you are working on Chromium, refer to this <a href="https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer">page</a> for instructions. If you have any questions or suggestions, feel free to contact address-sanitizer@googlegroups.com<br /><br /><span class="post-author">Posted by Kostya Serebryany, Software Engineer </span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> <span class='twitter-custom social-wrapper' data-href='http://twitter.com/share?text=Chromium Blog:Testing Chromium: AddressSanitizer, a fast memory error detector.&url=https://blog.chromium.org/2011/06/testing-chromium-addresssanitizer-fast.html&via=ChromiumDev'> <img alt='Share on Twitter' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_twitter_black_24dp.png' width='24'/> </span> <span class='fb-custom social-wrapper' data-href='https://www.facebook.com/sharer.php?u=https://blog.chromium.org/2011/06/testing-chromium-addresssanitizer-fast.html'> <img alt='Share on Facebook' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_facebook_black_24dp.png' width='24'/> </span> </div> <div class='post-footer'> <div class='cmt_iframe_holder' data-href='https://blog.chromium.org/2011/06/testing-chromium-addresssanitizer-fast.html' data-viewtype='FILTERED_POSTMOD'></div> <a href='https://plus.google.com/112374322230920073195' rel='author' style='display:none;'> Google </a> <div class='label-footer'> </div> </div> </div> <div class='post' data-id='6963395838232395757' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://blog.chromium.org/2011/06/new-chromium-security-features-june.html' itemprop='url' title='New Chromium security features, June 2011'> New Chromium security features, June 2011 </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> Tuesday, June 14, 2011 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> When the Google Chrome Security Team isn’t busy giving prompt attention to finding and fixing bugs, we’re always looking for new security features to add and hardening tweaks to apply. There are some changes worth highlighting in our current and near-future Chromium versions:<br /><br /><span style="font-weight:bold;">Chromium 11: strong random numbers for the web</span><br />We added a new Javascript API for getting access to a good source of system entropy from a web page. The new API is <span style="font-weight:bold;">window.crypto.getRandomValues</span>. Web pages should not currently be using Math.random for anything sensitive. Instead of making a round-trip to the server to generate strong random numbers, web sites can now generate strong random numbers entirely on the client.<br /><br /><span style="font-weight:bold;">Chromium 12: user-specified HSTS preloads and certificate pins</span><br />Advanced users can enable stronger security for some web sites by visiting the network internals page: chrome://net-internals/#hsts<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="//3.bp.blogspot.com/-s70rejSpThk/TffcXzAO17I/AAAAAAAAAFA/bX2hwmYzmNk/s1600/hsts.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5618201361554266034" src="//3.bp.blogspot.com/-s70rejSpThk/TffcXzAO17I/AAAAAAAAAFA/bX2hwmYzmNk/s400/hsts.png" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 238px;"></a><br />You can now force HTTPS for any domain you want, and even “pin” that domain so that only a more trusted subset of CAs are permitted to identify that domain.<br /><br /><span style="font-style:italic;">It’s an exciting feature but we’d like to warn that it’s easy to break things! We recommend that only experts experiment with net internals settings</span>.<br /><br /><span style="font-weight:bold;">Chromium 13: blocking HTTP auth for subresource loads</span><br />There’s an unfortunate conflict between a browser’s HTTP basic auth dialog, the location bar, and the loading of subresources (such as attacker-provided <img&gt tag references). It’s possible for a basic auth dialog to pop up for a different origin from the origin shown in the URL bar. Although the basic auth dialog identifies its origin, the user might reasonably look to the URL bar for trust guidance.<br /><br />To resolve this, we’ve blocked HTTP basic auth for subresource loads where the resource origin is different to the top-level URL bar origin. We also added the command line flag switch --allow-cross-origin-auth-prompt in case anyone has legacy applications which require the old behavior.<br /><br /><span style="font-weight:bold;">Chromium 13: Content-Security-Policy support</span><br />We added an initial implementation of <a href="http://people.mozilla.com/~bsterne/content-security-policy/ ">Content Security Policy</a>, which was first introduced in Firefox 4. You can use the X-WebKit-CSP header to experiment with our implementation. We’re working with Mozilla and others through the W3C to finish the standard. Once that’s done, we’ll remove support for the X-WebKit-CSP header and add support for the final header name. Please feel encouraged to kick the tires and let us know how we can improve this feature!<br /><br /><span style="font-weight:bold;">Chromium 13: built-in certificate pinning and HSTS</span><br />We’re experimenting with ways to improve the security of HTTPS. One of the sites we’re collaborating with to try new security measures is Gmail.<br /><br />As of Chromium 13, all connections to Gmail will be over HTTPS. This includes the initial navigation even if the user types “gmail.com” or “mail.google.com” into the URL bar without an https:// prefix, which defends against <a href="http://www.thoughtcrime.org/software/sslstrip/">sslstrip-type</a> attacks.<br /><br />The same HSTS technology also prevents users from clicking through SSL warnings for things such as a self-signed certificate. These attacks have been seen in the wild, and users have been known to fall for such attacks. Now there’s a mechanism to prevent them from doing so on sensitive domains.<br /><br />In addition in Chromium 13, only a very small subset of CAs have the authority to vouch for Gmail (and the Google Accounts login page). This can protect against <a href="http://googleonlinesecurity.blogspot.com/2011/04/improving-ssl-certificate-security.html">recent incidents</a> where a CA has its authority abused, and generally protects against the proliferation of signing authority.<br /><br /><span style="font-weight:bold;">Chromium 13: defenses for self-XSS via javascript URLs</span><br />Working together with Facebook and other browser vendors, we’re trialing a self-XSS defense that makes it harder for users to shoot themselves in the foot when they are tricked into pasting javascript: URLs into the omnibox.<br /><br />This is an interesting area because it’s hard to know what detail of instruction it is possible to trick a user into following. It is also hard to measure success until a large percentage of installed browsers have the defense (thus forcing the attackers to adapt their approach).<br /><br /><span style="font-weight:bold;">Still hiring!</span><br />We are always looking to expand the Google Chrome Security Team, and we’re looking for a wide range of talents for both Chrome and ChromeOS. We can promise exciting and varied work, working to protect hundreds of millions of users and working alongside the best in the industry. Why not have a look at our <a href="//www.google.com/intl/mn/jobs/uslocations/mountain-view/swe/information-security-engineer-chrome-mountain-view/index.html">job posting</a>?<br /><br /><span class='post-author'>Posted by Chris Evans of the Google Chrome Security Team. With thanks to Adam Barth, Adam Langley, Cris Neckar and Tom Sepez for implementing the above features.</span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> When the Google Chrome Security Team isn’t busy giving prompt attention to finding and fixing bugs, we’re always looking for new security features to add and hardening tweaks to apply. There are some changes worth highlighting in our current and near-future Chromium versions:<br /><br /><span style="font-weight:bold;">Chromium 11: strong random numbers for the web</span><br />We added a new Javascript API for getting access to a good source of system entropy from a web page. The new API is <span style="font-weight:bold;">window.crypto.getRandomValues</span>. Web pages should not currently be using Math.random for anything sensitive. Instead of making a round-trip to the server to generate strong random numbers, web sites can now generate strong random numbers entirely on the client.<br /><br /><span style="font-weight:bold;">Chromium 12: user-specified HSTS preloads and certificate pins</span><br />Advanced users can enable stronger security for some web sites by visiting the network internals page: chrome://net-internals/#hsts<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="//3.bp.blogspot.com/-s70rejSpThk/TffcXzAO17I/AAAAAAAAAFA/bX2hwmYzmNk/s1600/hsts.png"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5618201361554266034" src="//3.bp.blogspot.com/-s70rejSpThk/TffcXzAO17I/AAAAAAAAAFA/bX2hwmYzmNk/s400/hsts.png" style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 238px;"></a><br />You can now force HTTPS for any domain you want, and even “pin” that domain so that only a more trusted subset of CAs are permitted to identify that domain.<br /><br /><span style="font-style:italic;">It’s an exciting feature but we’d like to warn that it’s easy to break things! We recommend that only experts experiment with net internals settings</span>.<br /><br /><span style="font-weight:bold;">Chromium 13: blocking HTTP auth for subresource loads</span><br />There’s an unfortunate conflict between a browser’s HTTP basic auth dialog, the location bar, and the loading of subresources (such as attacker-provided <img&gt tag references). It’s possible for a basic auth dialog to pop up for a different origin from the origin shown in the URL bar. Although the basic auth dialog identifies its origin, the user might reasonably look to the URL bar for trust guidance.<br /><br />To resolve this, we’ve blocked HTTP basic auth for subresource loads where the resource origin is different to the top-level URL bar origin. We also added the command line flag switch --allow-cross-origin-auth-prompt in case anyone has legacy applications which require the old behavior.<br /><br /><span style="font-weight:bold;">Chromium 13: Content-Security-Policy support</span><br />We added an initial implementation of <a href="http://people.mozilla.com/~bsterne/content-security-policy/ ">Content Security Policy</a>, which was first introduced in Firefox 4. You can use the X-WebKit-CSP header to experiment with our implementation. We’re working with Mozilla and others through the W3C to finish the standard. Once that’s done, we’ll remove support for the X-WebKit-CSP header and add support for the final header name. Please feel encouraged to kick the tires and let us know how we can improve this feature!<br /><br /><span style="font-weight:bold;">Chromium 13: built-in certificate pinning and HSTS</span><br />We’re experimenting with ways to improve the security of HTTPS. One of the sites we’re collaborating with to try new security measures is Gmail.<br /><br />As of Chromium 13, all connections to Gmail will be over HTTPS. This includes the initial navigation even if the user types “gmail.com” or “mail.google.com” into the URL bar without an https:// prefix, which defends against <a href="http://www.thoughtcrime.org/software/sslstrip/">sslstrip-type</a> attacks.<br /><br />The same HSTS technology also prevents users from clicking through SSL warnings for things such as a self-signed certificate. These attacks have been seen in the wild, and users have been known to fall for such attacks. Now there’s a mechanism to prevent them from doing so on sensitive domains.<br /><br />In addition in Chromium 13, only a very small subset of CAs have the authority to vouch for Gmail (and the Google Accounts login page). This can protect against <a href="http://googleonlinesecurity.blogspot.com/2011/04/improving-ssl-certificate-security.html">recent incidents</a> where a CA has its authority abused, and generally protects against the proliferation of signing authority.<br /><br /><span style="font-weight:bold;">Chromium 13: defenses for self-XSS via javascript URLs</span><br />Working together with Facebook and other browser vendors, we’re trialing a self-XSS defense that makes it harder for users to shoot themselves in the foot when they are tricked into pasting javascript: URLs into the omnibox.<br /><br />This is an interesting area because it’s hard to know what detail of instruction it is possible to trick a user into following. It is also hard to measure success until a large percentage of installed browsers have the defense (thus forcing the attackers to adapt their approach).<br /><br /><span style="font-weight:bold;">Still hiring!</span><br />We are always looking to expand the Google Chrome Security Team, and we’re looking for a wide range of talents for both Chrome and ChromeOS. We can promise exciting and varied work, working to protect hundreds of millions of users and working alongside the best in the industry. Why not have a look at our <a href="//www.google.com/intl/mn/jobs/uslocations/mountain-view/swe/information-security-engineer-chrome-mountain-view/index.html">job posting</a>?<br /><br /><span class='post-author'>Posted by Chris Evans of the Google Chrome Security Team. With thanks to Adam Barth, Adam Langley, Cris Neckar and Tom Sepez for implementing the above features.</span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> <span class='twitter-custom social-wrapper' data-href='http://twitter.com/share?text=Chromium Blog:New Chromium security features, June 2011&url=https://blog.chromium.org/2011/06/new-chromium-security-features-june.html&via=ChromiumDev'> <img alt='Share on Twitter' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_twitter_black_24dp.png' width='24'/> </span> <span class='fb-custom social-wrapper' data-href='https://www.facebook.com/sharer.php?u=https://blog.chromium.org/2011/06/new-chromium-security-features-june.html'> <img alt='Share on Facebook' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_facebook_black_24dp.png' width='24'/> </span> </div> <div class='post-footer'> <div class='cmt_iframe_holder' data-href='https://blog.chromium.org/2011/06/new-chromium-security-features-june.html' data-viewtype='FILTERED_POSTMOD'></div> <a href='https://plus.google.com/112374322230920073195' rel='author' style='display:none;'> Google </a> <div class='label-footer'> <span class='labels-caption'> Labels: </span> <span class='labels'> <a class='label' href='https://blog.chromium.org/search/label/security' rel='tag'> security </a> </span> </div> </div> </div> <div class='post' data-id='1704474276209961934' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://blog.chromium.org/2011/06/prerendering-in-chrome.html' itemprop='url' title='Prerendering in Chrome'> Prerendering in Chrome </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> Tuesday, June 14, 2011 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> Google.com's new Instant Pages feature, <a href="http://googleblog.blogspot.com/2011/06/knocking-down-barriers-to-knowledge.html">announced earlier today</a>, makes some sites appear to load almost instantly when you click on them from the search results page. The feature is enabled by prerendering, a technology that we built into the upcoming version of Chrome, currently in the Dev channel. You can see Instant Pages in action in this video:<br /><br /><iframe width="560" height="349" src="//www.youtube.com/embed/_Jn93FDx9oI" frameborder="0" allowfullscreen></iframe><br /><br />What is prerendering? Sometimes a site may be able to predict with reasonable accuracy which link the user is most likely to click on next--for example, the 'next page' link in a multi-page news article. In those cases, it would be faster and better for the user if the browser could get a head start loading the next page so that when the user clicks the page is already well on its way to being loaded. That's the fundamental idea behind prerendering. The browser fetches all of the sub-resources and does all of the work necessary to display the page. In many cases, the site simply seems to load instantly when the user clicks.<br /><br />Although Google.com is the most high profile site to use prerendering, it's a technology that is available to any site. Triggering prerendering well, however, is challenging to do correctly and will only be useful to a handful of sites that have a high degree of certainty of where their users will click next. Triggering prerendering for the wrong site could lead to the link the user <i>did click on</i> loading more slowly.<br /><br />The vast majority of sites will automatically work correctly when a third party like Google.com asks Chrome to prerender them. If you're interested in testing how your page behaves when being prerendered you can use <a href="http://prerender-test.appspot.com/">this sample page</a>. If you want your page to behave differently, you can use Chrome's new experimental page visibility API to detect prerendering.<br /><br />The <a href="http://www.w3.org/TR/2011/WD-page-visibility-20110602/">page visibility API</a> - which is in the early stages of standardization in the webperf working group - can help developers understand the visibility status of their page: whether it's in a foreground tab, a background tab, or being prerendered. This is still an experimental implementation and it may change or even be removed in the future, which is why for the time being we've prefixed the property names with "webkit.” Although the page visibility API is useful for detecting prerendering, it also has many other applications--for example, allowing a site to pause expensive physics calculations when the page isn't visible.<br /><br />To learn more about the page visibility API and prerendering, check out the <a href="http://code.google.com/chrome/whitepapers/pagevisibility.html">Using the Page Visibility API</a> and <a href="http://code.google.com/chrome/whitepapers/prerender.html">Web Developers' Guide to Prerendering in Chrome</a> articles. <br /><br /><span class='post-author'>Posted by Alex Komoroske</span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> Google.com's new Instant Pages feature, <a href="http://googleblog.blogspot.com/2011/06/knocking-down-barriers-to-knowledge.html">announced earlier today</a>, makes some sites appear to load almost instantly when you click on them from the search results page. The feature is enabled by prerendering, a technology that we built into the upcoming version of Chrome, currently in the Dev channel. You can see Instant Pages in action in this video:<br /><br /><iframe width="560" height="349" src="//www.youtube.com/embed/_Jn93FDx9oI" frameborder="0" allowfullscreen></iframe><br /><br />What is prerendering? Sometimes a site may be able to predict with reasonable accuracy which link the user is most likely to click on next--for example, the 'next page' link in a multi-page news article. In those cases, it would be faster and better for the user if the browser could get a head start loading the next page so that when the user clicks the page is already well on its way to being loaded. That's the fundamental idea behind prerendering. The browser fetches all of the sub-resources and does all of the work necessary to display the page. In many cases, the site simply seems to load instantly when the user clicks.<br /><br />Although Google.com is the most high profile site to use prerendering, it's a technology that is available to any site. Triggering prerendering well, however, is challenging to do correctly and will only be useful to a handful of sites that have a high degree of certainty of where their users will click next. Triggering prerendering for the wrong site could lead to the link the user <i>did click on</i> loading more slowly.<br /><br />The vast majority of sites will automatically work correctly when a third party like Google.com asks Chrome to prerender them. If you're interested in testing how your page behaves when being prerendered you can use <a href="http://prerender-test.appspot.com/">this sample page</a>. If you want your page to behave differently, you can use Chrome's new experimental page visibility API to detect prerendering.<br /><br />The <a href="http://www.w3.org/TR/2011/WD-page-visibility-20110602/">page visibility API</a> - which is in the early stages of standardization in the webperf working group - can help developers understand the visibility status of their page: whether it's in a foreground tab, a background tab, or being prerendered. This is still an experimental implementation and it may change or even be removed in the future, which is why for the time being we've prefixed the property names with "webkit.” Although the page visibility API is useful for detecting prerendering, it also has many other applications--for example, allowing a site to pause expensive physics calculations when the page isn't visible.<br /><br />To learn more about the page visibility API and prerendering, check out the <a href="http://code.google.com/chrome/whitepapers/pagevisibility.html">Using the Page Visibility API</a> and <a href="http://code.google.com/chrome/whitepapers/prerender.html">Web Developers' Guide to Prerendering in Chrome</a> articles. <br /><br /><span class='post-author'>Posted by Alex Komoroske</span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> 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<a dir='ltr' href='https://blog.chromium.org/search/label/images'> images </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/incognito'> incognito </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/insecure%20forms'> insecure forms </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/intent%20to%20explain'> intent to explain </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/ios'> ios </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/ios%20Chrome'> ios Chrome </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/issue%20tracker'> issue tracker </a> <span dir='ltr'> 3 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/jank'> jank </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/javascript'> javascript </a> <span dir='ltr'> 5 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/lab%20data'> lab data </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/labelling'> labelling </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/largest%20contentful%20paint'> largest contentful paint </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/launch'> launch </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/lazy-loading'> lazy-loading </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/lighthouse'> lighthouse </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/linux'> linux </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Lite%20Mode'> Lite Mode </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Lite%20pages'> Lite pages </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/loading%20interventions'> loading interventions </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/loading%20optimizations'> loading optimizations </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/lock%20icon'> lock icon </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/long-tail'> long-tail </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/mac'> mac </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/manifest%20v3'> manifest v3 </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/metrics'> metrics </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/microsoft%20edge'> microsoft edge </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/mixed%20forms'> mixed forms </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/mobile'> mobile </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/na'> na </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/native%20client'> native client </a> <span dir='ltr'> 8 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/native%20file%20system'> native file system </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/New%20Features'> New Features </a> <span dir='ltr'> 5 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/notifications'> notifications </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/octane'> octane </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/open%20web'> open web </a> <span dir='ltr'> 4 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/origin%20trials'> origin trials </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/pagespeed%20insights'> pagespeed insights </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/pagespeedinsights'> pagespeedinsights </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/passwords'> passwords </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/payment%20handler'> payment handler </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/payment%20request'> payment request </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/payments'> payments </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/performance'> performance </a> <span dir='ltr'> 20 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/performance%20tools'> performance tools </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/permission%20UI'> permission UI </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/permissions'> permissions </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/play%20store'> play store </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/portals'> portals </a> <span dir='ltr'> 3 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/prefetching'> prefetching </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/privacy'> privacy </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/privacy%20sandbox'> privacy sandbox </a> <span dir='ltr'> 4 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/private%20prefetch%20proxy'> private prefetch proxy </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/profile%20guided%20optimization'> profile guided optimization </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/progressive%20web%20apps'> progressive web apps </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Project%20Strobe'> Project Strobe </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/protection'> protection </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/pwa'> pwa </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/QUIC'> QUIC </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/quieter%20permissions'> quieter permissions </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/releases'> releases </a> <span dir='ltr'> 3 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/removals'> removals </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/rlz'> rlz </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/root%20program'> root program </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/safe%20browsing'> safe browsing </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Secure%20DNS'> Secure DNS </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/security'> security </a> <span dir='ltr'> 36 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/site%20isolation'> site isolation </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/slow%20loading'> slow loading </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/sms%20receiver'> sms receiver </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/spam%20policy'> spam policy </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/spdy'> spdy </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/spectre'> spectre </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/speed'> speed </a> <span dir='ltr'> 4 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/ssl'> ssl </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/store%20listing'> store listing </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/strobe'> strobe </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/subscription%20pages'> subscription pages </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/suspicious%20site%20reporter%20extension'> suspicious site reporter extension </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/TCP'> TCP </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/the%20fast%20and%20the%20curious'> the fast and the curious </a> <span dir='ltr'> 23 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/TLS'> TLS </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/tools'> tools </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/tracing'> tracing </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/transparency'> transparency </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/trusted%20web%20activities'> trusted web activities </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/twa'> twa </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/user%20agent%20string'> user agent string </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/user%20data%20policy'> user data policy </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/v8'> v8 </a> <span dir='ltr'> 6 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/video'> video </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/wasm'> wasm </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web'> web </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20apps'> web apps </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20assembly'> web assembly </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20developers'> web developers </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20intents'> web intents </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20packaging'> web packaging </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20payments'> web payments </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20platform'> web platform </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20request%20api'> web request api </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web%20vitals'> web vitals </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web.dev'> web.dev </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/web.dev%20live'> web.dev live </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webapi'> webapi </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webassembly'> webassembly </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webaudio'> webaudio </a> <span dir='ltr'> 3 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webgl'> webgl </a> <span dir='ltr'> 7 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webkit'> webkit </a> <span dir='ltr'> 5 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/WebM'> WebM </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webmaster'> webmaster </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webp'> webp </a> <span dir='ltr'> 5 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webrtc'> webrtc </a> <span dir='ltr'> 6 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/websockets'> websockets </a> <span dir='ltr'> 5 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/webtiming'> webtiming </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/writable-files'> writable-files </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/yerba%20beuna%20center%20for%20the%20arts'> yerba beuna center for the arts </a> <span dir='ltr'> 1 </span> </li> </ul> <div class='clear'></div> </div> </div><div class='widget BlogArchive' data-version='1' id='BlogArchive1'> <div class='tab'> <i class='material-icons icon'>  </i> <h2> Archive </h2> <i class='material-icons arrow'>  </i> </div> <div class='widget-content'> <div id='ArchiveList'> <div id='BlogArchive1_ArchiveList'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://blog.chromium.org/2025/'> 2025 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2025/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> 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class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2024/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2024/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2024/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2024/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://blog.chromium.org/2023/'> 2023 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2023/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2023/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2023/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' 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class=''> <a class='post-count-link' href='https://blog.chromium.org/2022/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2022/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2022/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2022/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2022/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2022/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://blog.chromium.org/2021/'> 2021 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2021/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2021/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li 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href='https://blog.chromium.org/2018/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2018/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2018/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2018/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2018/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2018/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2018/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2018/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://blog.chromium.org/2017/'> 2017 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> 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class=''> <a class='post-count-link' href='https://blog.chromium.org/2017/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2017/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2017/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2017/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2017/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2017/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2017/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://blog.chromium.org/2016/'> 2016 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2016/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2016/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2016/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2016/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2016/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2016/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li 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href='https://blog.chromium.org/2013/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2013/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2013/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2013/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2013/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2013/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2013/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2013/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://blog.chromium.org/2012/'> 2012 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> 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class=''> <a class='post-count-link' href='https://blog.chromium.org/2012/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2012/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2012/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2012/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2012/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> 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class='hierarchy'> <li class='archivedate expanded'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2011/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2011/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2011/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2011/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2011/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2011/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://blog.chromium.org/2010/'> 2010 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2010/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2010/11/'> Nov </a> </div> 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href='https://blog.chromium.org/2009/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2009/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2009/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2009/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i 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