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} .loading { visibility: hidden; } .detail-page .post-footer .cmt_iframe_holder { padding-top: 40px !important; } /** Desktop **/ @media (max-width: 900px) { .col-right { display: none; } .col-main { margin-right: 0; min-width: initial; } .footer-outer { display: none; } .cols-wrapper { min-width: initial; } .google-footer-outer { background-color: #f5f5f5; } } /** Tablet **/ @media (max-width: 712px) { .header-outer, .cols-wrapper, .footer-outer, .google-footer-outer { padding: 0 40px; } } /* An extra breakpoint accommodating for long blog titles. */ @media (max-width: 600px) { .header-left { height: 100%; position: initial; top: inherit; margin-top: 0; -webkit-transform: initial; transform: initial; } .header-title { margin-top: 18px; } .header-inner { height: auto; margin-bottom: 32px; margin-top: 32px; } .header-desc { margin-top: 12px; } .header-inner .google-logo { height: 70px; margin-top: 3px; } .header-inner .google-logo img { height: 70px; } .header-title h2 { font-size: 32px; 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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='1518125359438141713' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://blog.chromium.org/2011/07/writing-extensions-more-securely.html' itemprop='url' title='Writing Extensions More Securely'> Writing Extensions More Securely </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> Friday, July 22, 2011 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> Extensions are powerful pieces of software in modern browsers, and as such, you should help ensure that your extensions are not susceptible to security exploits. If an attacker manages to exploit a vulnerability in an extension, it’s serious business because they may gain access to the same privileges that the extension has.<br /><br />The Chrome extensions system has a number of <a href="http://blog.chromium.org/2009/12/security-in-depth-extension-system.html">built-in protections</a> to make it more difficult to introduce exploitable code, but certain coding patterns can still open up the risk of exploits like a cross-site scripting (XSS) attack. Many of these mistakes are common to web programming in general, so it wouldn’t be a bad idea to check out one of the <a href="https://www.owasp.org/index.php/XSS_(Cross_Site_Scripting)_Prevention_Cheat_Sheet">many</a> good <a href="http://en.wikipedia.org/wiki/Cross-site_scripting">articles</a> on the net about XSS bugs. Here are some of our recommendations for writing healthier extensions.<br /><br /><strong>Minimize your permissions</strong><br /><br />The most important thing to consider is whether you’re declaring the minimal set of permissions that you need to function. That way, if you do have a security bug in your code, the amount of permissions you’re exposing to the attacker is minimal as well. Avoid requesting <all_urls> (*/*) permissions for hosts if you only need to access a couple, and don’t copy and paste your manifest from example code blindly. Review your manifest to make sure you’re only declaring what you need. This applies to permissions like tabs, history, cookies, etc. in addition to host permissions. For example, if all you’re using is <a href="http://code.google.com/chrome/extensions/tabs.html#method-create">chrome.tabs.create</a>, you don’t actually need the tabs permission.<br /><br /><strong>Use content_security_policy in your manifest</strong><br /><br />Starting in Chrome 14, we will begin supporting <a href="http://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html">Content Security Policy</a> in extensions via the <a href="http://code.google.com/chrome/extensions/trunk/manifest.html#content_security_policy">content_security_policy</a> manifest field. This allows you to control where scripts can be executed, and it can be used to help reduce your exposure to cross-site scripting vulnerabilities. For example, to specify that your extension loads resources only from its own package, use the following policy:<br /><br /><span style="font-family:courier">"content_security_policy": "default-src 'self'"</span><br /><br />If you need to include scripts from specific hosts, you can add those hosts to this property.<br /><br /><strong>Don’t use <script src> with an HTTP URL</strong><br /><br />When you include javascript into your pages using an HTTP URL, you’re opening your extension up to man-in-the-middle (MITM) attacks. When you do so in a content script, you have a similar effect on the pages you’re injected into. An attacker on the same network as one of your users could replace the contents of the script with content that they control. If that happens, they could do anything that your page can do.<br /><br />If you need to fetch a remote script, always use HTTPS from a trusted source.<br /><br /><strong>Don’t use eval()</strong><br /><br />The eval() function is very powerful and you should refrain from using it unless absolutely necessary. Where did the code come from that you passed into eval()? If it came from an HTTP URL, you’re vulnerable to the same issue as the previously mentioned <script> tag. If any of the content that you passed into eval() is based on content from a random web page the user visits, you’re vulnerable to escaping bugs. For example, let’s say that you have some code that looks like this:<br /><br /><span style="font-family:courier">function displayAddress(address) { // address was detected and grabbed from the current page<br />eval("alert('" + address + "')");<br />}</span><br /><br />If it turned out that you had a bug in your parsing code, the address might wind up looking something like this:<br /><br /><span style="font-family:courier">'); dosomethingevil();</span><br /><br />There’s almost always a better alternative to using eval(). For example, you can use JSON.parse if you want to parse JSON (with the added benefit that it runs faster). It’s worth the extra effort to use alternatives like this.<br /><br /><strong>Don’t use innerHTML or document.write()</strong><br /><br />It’s really tempting to use innerHTML because it’s much simpler to generate markup dynamically than to create DOM nodes one at a time. However, this again sets you up for bugs in escaping your content. For example:<br /><br /><span style="font-family:courier">function displayAddress(address) { // address was detected and grabbed from the current page<br />myDiv.innerHTML = "<b>" + address + "</b>");<br />}</span><br /><br />This would allow an attacker to make an address like the following and once again run some script in your page:<br /><br /><span style="font-family:courier"><script>dosomethingevil();</script></span><br /><br />Instead of innerHTML, you can manually create DOM nodes and use innerText to insert dynamic content.<br /><br /><strong>Beware external content</strong><br /><br />In general, if you’re generating dynamic content based on data from outside of your extension (such as something you fetched from the network, something you parsed from a page, or a message you received from another extension, etc.), you should be extremely careful about how you use it. If you use this data to generate content within your extension, you might be opening your users up to increased risk.<br /><br />You can also read a <a href="http://code.google.com/chrome/extensions/content_scripts.html#security-considerations">few more</a> examples of the issues discussed here in our extension docs. We hope these recommendations help you create better and safer extensions for everyone.<br /><br /><span class="post-author">Posted by Erik Kay, Software Engineer </span></all_urls> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> Extensions are powerful pieces of software in modern browsers, and as such, you should help ensure that your extensions are not susceptible to security exploits. If an attacker manages to exploit a vulnerability in an extension, it’s serious business because they may gain access to the same privileges that the extension has.<br /><br />The Chrome extensions system has a number of <a href="http://blog.chromium.org/2009/12/security-in-depth-extension-system.html">built-in protections</a> to make it more difficult to introduce exploitable code, but certain coding patterns can still open up the risk of exploits like a cross-site scripting (XSS) attack. Many of these mistakes are common to web programming in general, so it wouldn’t be a bad idea to check out one of the <a href="https://www.owasp.org/index.php/XSS_(Cross_Site_Scripting)_Prevention_Cheat_Sheet">many</a> good <a href="http://en.wikipedia.org/wiki/Cross-site_scripting">articles</a> on the net about XSS bugs. Here are some of our recommendations for writing healthier extensions.<br /><br /><strong>Minimize your permissions</strong><br /><br />The most important thing to consider is whether you’re declaring the minimal set of permissions that you need to function. That way, if you do have a security bug in your code, the amount of permissions you’re exposing to the attacker is minimal as well. Avoid requesting <all_urls> (*/*) permissions for hosts if you only need to access a couple, and don’t copy and paste your manifest from example code blindly. Review your manifest to make sure you’re only declaring what you need. This applies to permissions like tabs, history, cookies, etc. in addition to host permissions. For example, if all you’re using is <a href="http://code.google.com/chrome/extensions/tabs.html#method-create">chrome.tabs.create</a>, you don’t actually need the tabs permission.<br /><br /><strong>Use content_security_policy in your manifest</strong><br /><br />Starting in Chrome 14, we will begin supporting <a href="http://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html">Content Security Policy</a> in extensions via the <a href="http://code.google.com/chrome/extensions/trunk/manifest.html#content_security_policy">content_security_policy</a> manifest field. This allows you to control where scripts can be executed, and it can be used to help reduce your exposure to cross-site scripting vulnerabilities. For example, to specify that your extension loads resources only from its own package, use the following policy:<br /><br /><span style="font-family:courier">"content_security_policy": "default-src 'self'"</span><br /><br />If you need to include scripts from specific hosts, you can add those hosts to this property.<br /><br /><strong>Don’t use <script src> with an HTTP URL</strong><br /><br />When you include javascript into your pages using an HTTP URL, you’re opening your extension up to man-in-the-middle (MITM) attacks. When you do so in a content script, you have a similar effect on the pages you’re injected into. An attacker on the same network as one of your users could replace the contents of the script with content that they control. If that happens, they could do anything that your page can do.<br /><br />If you need to fetch a remote script, always use HTTPS from a trusted source.<br /><br /><strong>Don’t use eval()</strong><br /><br />The eval() function is very powerful and you should refrain from using it unless absolutely necessary. Where did the code come from that you passed into eval()? If it came from an HTTP URL, you’re vulnerable to the same issue as the previously mentioned <script> tag. If any of the content that you passed into eval() is based on content from a random web page the user visits, you’re vulnerable to escaping bugs. For example, let’s say that you have some code that looks like this:<br /><br /><span style="font-family:courier">function displayAddress(address) { // address was detected and grabbed from the current page<br />eval("alert('" + address + "')");<br />}</span><br /><br />If it turned out that you had a bug in your parsing code, the address might wind up looking something like this:<br /><br /><span style="font-family:courier">'); dosomethingevil();</span><br /><br />There’s almost always a better alternative to using eval(). For example, you can use JSON.parse if you want to parse JSON (with the added benefit that it runs faster). It’s worth the extra effort to use alternatives like this.<br /><br /><strong>Don’t use innerHTML or document.write()</strong><br /><br />It’s really tempting to use innerHTML because it’s much simpler to generate markup dynamically than to create DOM nodes one at a time. However, this again sets you up for bugs in escaping your content. For example:<br /><br /><span style="font-family:courier">function displayAddress(address) { // address was detected and grabbed from the current page<br />myDiv.innerHTML = "<b>" + address + "</b>");<br />}</span><br /><br />This would allow an attacker to make an address like the following and once again run some script in your page:<br /><br /><span style="font-family:courier"><script>dosomethingevil();</script></span><br /><br />Instead of innerHTML, you can manually create DOM nodes and use innerText to insert dynamic content.<br /><br /><strong>Beware external content</strong><br /><br />In general, if you’re generating dynamic content based on data from outside of your extension (such as something you fetched from the network, something you parsed from a page, or a message you received from another extension, etc.), you should be extremely careful about how you use it. If you use this data to generate content within your extension, you might be opening your users up to increased risk.<br /><br />You can also read a <a href="http://code.google.com/chrome/extensions/content_scripts.html#security-considerations">few more</a> examples of the issues discussed here in our extension docs. We hope these recommendations help you create better and safer extensions for everyone.<br /><br /><span class="post-author">Posted by Erik Kay, Software Engineer </span></all_urls> <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:Writing Extensions More Securely&url=https://blog.chromium.org/2011/07/writing-extensions-more-securely.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/2011/07/writing-extensions-more-securely.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/2011/07/writing-extensions-more-securely.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='7641044569018855631' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://blog.chromium.org/2011/07/chrome-extensions-now-with-more.html' itemprop='url' title='Chrome Extensions: Now with more powerful scripts and improved proxy management.'> Chrome Extensions: Now with more powerful scripts and improved proxy management. </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> Wednesday, July 13, 2011 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> In Chrome 13, we added some new capabilities to content scripts and proxy management.<br /><br />First, you can now make cross-origin XMLHttpRequest calls with the privileges of the extension directly from your content script. You will no longer need to relay these requests through a background page; this should simplify your code. In some cases, it may even eliminate your need to use a background page. Here’s a <a href="http://code.google.com/chrome/extensions/samples.html#6871d09f4a96bf9d4b6cc724d00e909cee0f3902">sample extension</a> which demonstrates the old way a content script could make a cross domain request. As you can see, the extension required a <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/howto/contentscript_xhr/background.html?view=markup&pathrev=91622">background page</a> to route the cross-origin calls through a <span style="font-family:courier">chrome.extension.onRequest</span> listener. Using the new content script cross-origin capabilities, we were able to successfully <a href="http://src.chromium.org/viewvc/chrome?view=rev&revision=91623">rewrite the extension</a> to completely eliminate the background page requirement. This reduces the memory required to run the extension, and reduces code complexity as well. This also means that Greasemonkey scripts that use <span style="font-family:courier">GM_xmlhttpRequest</span> - such as the classic <a href="http://userscripts.org/scripts/show/1859">Book Burro</a> - will now work in Chrome.<br /><br />Second, we improved how <a href="http://code.google.com/chrome/extensions/trunk/content_scripts.html#match-patterns-globs">match patterns</a> work. Until this release you could specify a <span style="font-family:courier">matches</span> array for your content script - the URLs over which it should operate. In Chrome 13 you can now also specify an <span style="font-family:courier">exclude_matches</span> array, where you can indicate the pages in which your content scripts should not work. This should allow more precise targeting of your content script.<br /><br />Finally, we added support for the <a href="http://wiki.greasespot.net/Talk:Metadata_Block">@run-at</a> command for imported Greasemonkey scripts, so you can control when your script is loaded in the same way you’ve been able to do for content scripts. Running scripts at different points in a page's lifecycle can enable additional functionality. For example, we've written <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/howto/userscript-runat/runat.user.js?view=markup">a script</a> which runs at "document-start" and lists all of the HTTP resources included in the current page.<br /><br />In addition to these improvements to scripts, we’ve been working hard to allow extensions to manage Chrome’s proxy settings using different configuration options. With the <a href="http://code.google.com/chrome/extensions/trunk/proxy.html">Proxy Extension API</a>, you can now configure proxy settings by choosing from several options including auto detection, the host OS’s system default, PAC scripts or fixed <a href="http://code.google.com/chrome/extensions/trunk/proxy.html#proxy_rules">ProxyRules</a>.<br /><br />These new configuration options allow for more fine grained proxy controls, which we invite you to try out. There are already several 3rd party extensions available in the Chrome Web Store that showcase the API and its new capabilities, including <a href="https://chrome.google.com/webstore/detail/eejcbegfnjfjnmdikkplhbhnemddchbn">Proxy Anywhere</a> and <a href="https://chrome.google.com/webstore/detail/ipidcfpkiejdjjibecbippcokfipcfad">Proxy SwitchyPlus</a>. <br /><br />Let us know what you think of these new features and what else you might like to see us do by joining the discussion at chromium-extensions@chromium.org.<br /><br /><span class='post-author'>Posted by Tessa MacDuff and Mihai Parparita, Software Engineers </span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> In Chrome 13, we added some new capabilities to content scripts and proxy management.<br /><br />First, you can now make cross-origin XMLHttpRequest calls with the privileges of the extension directly from your content script. You will no longer need to relay these requests through a background page; this should simplify your code. In some cases, it may even eliminate your need to use a background page. Here’s a <a href="http://code.google.com/chrome/extensions/samples.html#6871d09f4a96bf9d4b6cc724d00e909cee0f3902">sample extension</a> which demonstrates the old way a content script could make a cross domain request. As you can see, the extension required a <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/howto/contentscript_xhr/background.html?view=markup&pathrev=91622">background page</a> to route the cross-origin calls through a <span style="font-family:courier">chrome.extension.onRequest</span> listener. Using the new content script cross-origin capabilities, we were able to successfully <a href="http://src.chromium.org/viewvc/chrome?view=rev&revision=91623">rewrite the extension</a> to completely eliminate the background page requirement. This reduces the memory required to run the extension, and reduces code complexity as well. This also means that Greasemonkey scripts that use <span style="font-family:courier">GM_xmlhttpRequest</span> - such as the classic <a href="http://userscripts.org/scripts/show/1859">Book Burro</a> - will now work in Chrome.<br /><br />Second, we improved how <a href="http://code.google.com/chrome/extensions/trunk/content_scripts.html#match-patterns-globs">match patterns</a> work. Until this release you could specify a <span style="font-family:courier">matches</span> array for your content script - the URLs over which it should operate. In Chrome 13 you can now also specify an <span style="font-family:courier">exclude_matches</span> array, where you can indicate the pages in which your content scripts should not work. This should allow more precise targeting of your content script.<br /><br />Finally, we added support for the <a href="http://wiki.greasespot.net/Talk:Metadata_Block">@run-at</a> command for imported Greasemonkey scripts, so you can control when your script is loaded in the same way you’ve been able to do for content scripts. Running scripts at different points in a page's lifecycle can enable additional functionality. For example, we've written <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/howto/userscript-runat/runat.user.js?view=markup">a script</a> which runs at "document-start" and lists all of the HTTP resources included in the current page.<br /><br />In addition to these improvements to scripts, we’ve been working hard to allow extensions to manage Chrome’s proxy settings using different configuration options. With the <a href="http://code.google.com/chrome/extensions/trunk/proxy.html">Proxy Extension API</a>, you can now configure proxy settings by choosing from several options including auto detection, the host OS’s system default, PAC scripts or fixed <a href="http://code.google.com/chrome/extensions/trunk/proxy.html#proxy_rules">ProxyRules</a>.<br /><br />These new configuration options allow for more fine grained proxy controls, which we invite you to try out. There are already several 3rd party extensions available in the Chrome Web Store that showcase the API and its new capabilities, including <a href="https://chrome.google.com/webstore/detail/eejcbegfnjfjnmdikkplhbhnemddchbn">Proxy Anywhere</a> and <a href="https://chrome.google.com/webstore/detail/ipidcfpkiejdjjibecbippcokfipcfad">Proxy SwitchyPlus</a>. <br /><br />Let us know what you think of these new features and what else you might like to see us do by joining the discussion at chromium-extensions@chromium.org.<br /><br /><span class='post-author'>Posted by Tessa MacDuff and Mihai Parparita, Software Engineers </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:Chrome Extensions: Now with more powerful scripts and improved proxy management.&url=https://blog.chromium.org/2011/07/chrome-extensions-now-with-more.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/2011/07/chrome-extensions-now-with-more.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/2011/07/chrome-extensions-now-with-more.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/extensions' rel='tag'> extensions </a> </span> </div> </div> </div> <div class='post' data-id='1342684305552804657' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://blog.chromium.org/2011/07/using-cross-domain-images-in-webgl-and.html' itemprop='url' title='Using Cross-domain images in WebGL and Chrome 13'> Using Cross-domain images in WebGL and Chrome 13 </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> Wednesday, July 6, 2011 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> A few weeks ago, we became aware of a <a href="http://www.khronos.org/webgl/public-mailing-list/archives/1010/msg00034.html">security issue</a> with WebGL: <a href="http://www.contextis.co.uk/resources/blog/webgl/poc/index.html">shaders could be used</a> to indirectly deduce the contents of textures uploaded to the GPU. As a result, the WebGL specification was <a href="http://www.khronos.org/registry/webgl/specs/latest/#4.2">updated</a> to be more restrictive when it comes to using cross-domain images and videos as WebGL textures.<br /><br />As a result, Chrome 13 (and Firefox 5) will no longer allow cross-domain media as a WebGL texture. The default behavior will be a DOM_SECURITY_ERR. However, applications may still utilize images and videos from another domain with the cooperation of the server hosting the media, otherwise known as <a href="http://www.w3.org/TR/cors/">CORS</a>.<br /><br /><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#cors-settings-attribute">CORS support</a> for MediaElements has also been fully implemented in WebKit by setting a new <span style="font-family:courier">.crossOrigin</span> attribute. This means that sophisticated applications that were using cross-origin textures before, can continue to do so, assuming the hosting image server grants the necessary cross-origin permission using CORS. If you want to enable CORS request on an image, all you have to do is add one line of code:<br /><br /><span style="font-family:courier">var img = document.createElement('img');<br />img.onload = function(e) { … };<br />img.crossOrigin = ''; // no credentials flag. Same as img.crossOrigin='anonymous'<br />img.src = 'http://other-domain.com/image.jpg';</span><br /><br />Another nice property that we gain from this new setting is the ability to read cross-domain image data set on a 2D canvas. Normally, filling a canvas with a remote image (e.g. <span style="font-family:courier">ctx.drawImage()</span>) flips the <a href="http://dev.w3.org/html5/spec/Overview.html#security-with-canvas-elements">origin-clean flag</a> to false. Attempting to read back the pixels using <span style="font-family:courier">ctx.toDataURL()</span> or <span style="font-family:courier">ctx.getImageData()</span> throws a SECURITY_ERR. This is to prevent information leakage. However, when <span style="font-family:courier">.crossOrigin</span> is set (and the remote server supports CORS), the read is possible. For example:<br /><br /><span style="font-family:courier">var img = document.createElement('img');<br />img.onload = function(e) {<br />ctx.drawImage(img, 0, 0, canvas.width, canvas.height);<br /><span style="font-weight:bold;">var url = canvas.toDataURL(); // Read succeeds, canvas won't be dirty.<br />};<br />img.crossOrigin = '';</span><br />img.src = 'http://other-domain.com/image.jpg';</span><br /><br />Unfortunately, this new restriction in WebGL means that some existing content will break. We’ve already started working with external image and video hosting services like Flickr to evangelize the <a href="http://enable-cors.org/">use of CORS</a> on their images.<br /><br />You can test this new behavior today using images from Picasa, which already sends a CORS header allowing cross-origin requests, and the <a href="http://www.chromium.org/getting-involved/dev-channel">Chrome dev channel</a>.<br /><br /><span class="post-author">Posted by Eric Bidelman, Developer Advocate </span> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> A few weeks ago, we became aware of a <a href="http://www.khronos.org/webgl/public-mailing-list/archives/1010/msg00034.html">security issue</a> with WebGL: <a href="http://www.contextis.co.uk/resources/blog/webgl/poc/index.html">shaders could be used</a> to indirectly deduce the contents of textures uploaded to the GPU. As a result, the WebGL specification was <a href="http://www.khronos.org/registry/webgl/specs/latest/#4.2">updated</a> to be more restrictive when it comes to using cross-domain images and videos as WebGL textures.<br /><br />As a result, Chrome 13 (and Firefox 5) will no longer allow cross-domain media as a WebGL texture. The default behavior will be a DOM_SECURITY_ERR. However, applications may still utilize images and videos from another domain with the cooperation of the server hosting the media, otherwise known as <a href="http://www.w3.org/TR/cors/">CORS</a>.<br /><br /><a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#cors-settings-attribute">CORS support</a> for MediaElements has also been fully implemented in WebKit by setting a new <span style="font-family:courier">.crossOrigin</span> attribute. This means that sophisticated applications that were using cross-origin textures before, can continue to do so, assuming the hosting image server grants the necessary cross-origin permission using CORS. If you want to enable CORS request on an image, all you have to do is add one line of code:<br /><br /><span style="font-family:courier">var img = document.createElement('img');<br />img.onload = function(e) { … };<br />img.crossOrigin = ''; // no credentials flag. Same as img.crossOrigin='anonymous'<br />img.src = 'http://other-domain.com/image.jpg';</span><br /><br />Another nice property that we gain from this new setting is the ability to read cross-domain image data set on a 2D canvas. Normally, filling a canvas with a remote image (e.g. <span style="font-family:courier">ctx.drawImage()</span>) flips the <a href="http://dev.w3.org/html5/spec/Overview.html#security-with-canvas-elements">origin-clean flag</a> to false. Attempting to read back the pixels using <span style="font-family:courier">ctx.toDataURL()</span> or <span style="font-family:courier">ctx.getImageData()</span> throws a SECURITY_ERR. This is to prevent information leakage. However, when <span style="font-family:courier">.crossOrigin</span> is set (and the remote server supports CORS), the read is possible. For example:<br /><br /><span style="font-family:courier">var img = document.createElement('img');<br />img.onload = function(e) {<br />ctx.drawImage(img, 0, 0, canvas.width, canvas.height);<br /><span style="font-weight:bold;">var url = canvas.toDataURL(); // Read succeeds, canvas won't be dirty.<br />};<br />img.crossOrigin = '';</span><br />img.src = 'http://other-domain.com/image.jpg';</span><br /><br />Unfortunately, this new restriction in WebGL means that some existing content will break. We’ve already started working with external image and video hosting services like Flickr to evangelize the <a href="http://enable-cors.org/">use of CORS</a> on their images.<br /><br />You can test this new behavior today using images from Picasa, which already sends a CORS header allowing cross-origin requests, and the <a href="http://www.chromium.org/getting-involved/dev-channel">Chrome dev channel</a>.<br /><br /><span class="post-author">Posted by Eric Bidelman, Developer Advocate </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:Using Cross-domain images in WebGL and Chrome 13&url=https://blog.chromium.org/2011/07/using-cross-domain-images-in-webgl-and.html&via=ChromiumDev'> <img alt='Share on Twitter' 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</li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/coalition%20for%20better%20ads'> coalition for better ads </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/contact%20picker'> contact picker </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/content%20indexing'> content indexing </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/cookies'> cookies </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/core%20web%20vitals'> core web vitals </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/csrf'> csrf </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/css'> css </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/cumulative%20layout%20shift'> cumulative layout shift </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/custom%20tabs'> custom tabs </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/dart'> dart </a> <span dir='ltr'> 8 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/dashboard'> dashboard </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Data%20Saver'> Data Saver </a> <span dir='ltr'> 3 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Data%20saver%20desktop%20extension'> Data saver desktop extension </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/day%202'> day 2 </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/deceptive%20installation'> deceptive installation </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/declarative%20net%20request%20api'> declarative net request api </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/design'> design </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/developer%20dashboard'> developer dashboard </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Developer%20Program%20Policy'> Developer Program Policy </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/developer%20website'> developer website </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/devtools'> devtools </a> <span dir='ltr'> 13 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/digital%20event'> digital event </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/discoverability'> discoverability </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/DNS-over-HTTPS'> DNS-over-HTTPS </a> <span dir='ltr'> 4 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/DoH'> DoH </a> <span dir='ltr'> 4 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/emoji'> emoji </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/emscriptem'> emscriptem </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/enterprise'> enterprise </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/extensions'> extensions </a> <span dir='ltr'> 27 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Fast%20badging'> Fast badging </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/faster%20web'> faster web </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/features'> features </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/feedback'> feedback </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/field%20data'> field data </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/first%20input%20delay'> first input delay </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/Follow'> Follow </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/fonts'> fonts </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/form%20controls'> form controls </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/frameworks'> frameworks </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/fugu'> fugu </a> <span dir='ltr'> 2 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/fund'> fund </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/funding'> funding </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/gdd'> gdd </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/google%20earth'> google earth </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/google%20event'> google event </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/google%20io%202019'> google io 2019 </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/google%20web%20developer'> google web developer </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/googlechrome'> googlechrome </a> <span dir='ltr'> 12 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/harmful%20ads'> harmful ads </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/html5'> html5 </a> <span dir='ltr'> 11 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/HTTP%2F3'> HTTP/3 </a> <span dir='ltr'> 1 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/HTTPS'> HTTPS </a> <span dir='ltr'> 4 </span> </li> <li> <a dir='ltr' href='https://blog.chromium.org/search/label/iframes'> iframes </a> <span dir='ltr'> 1 </span> </li> <li> <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> 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href='https://blog.chromium.org/2017/08/'> 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/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 class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2016/05/'> 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/2016/04/'> 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/2016/03/'> 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/2016/02/'> 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/2016/01/'> 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/2015/'> 2015 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2015/12/'> 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/2015/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li 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class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2015/05/'> 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/2015/04/'> 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/2015/03/'> 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/2015/02/'> 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/2015/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul 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</div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2014/09/'> 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/2014/08/'> 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/2014/07/'> 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/2014/06/'> 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/2014/05/'> May </a> </div> <div class='items'> </div> 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</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/2013/'> 2013 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2013/12/'> 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/2013/11/'> 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/2013/10/'> 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/2013/09/'> 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/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'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2012/12/'> 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/2012/11/'> 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/2012/10/'> 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/2012/09/'> 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/2012/08/'> 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/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=''> <a class='post-count-link' href='https://blog.chromium.org/2012/02/'> 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/2012/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate expanded'> <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 toggle-open'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://blog.chromium.org/2011/'> 2011 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2011/12/'> 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/2011/11/'> 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/2011/10/'> 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/2011/09/'> 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/2011/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate expanded'> <div class=''> <a class='post-count-link' href='https://blog.chromium.org/2011/07/'> 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/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> <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/2010/10/'> 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/2010/09/'> 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/2010/08/'> 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/2010/07/'> 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/2010/06/'> 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/2010/05/'> 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/2010/04/'> 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/2010/03/'> 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/2010/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li 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style='margin-top: -16px;' width='92'/> </a> <ul> <li> <a href='//www.google.com/'> Google </a> </li> <li> <a href='//www.google.com/policies/privacy/'> Privacy </a> </li> <li> <a href='//www.google.com/policies/terms/'> Terms </a> </li> </ul> </div> </div> <script type='text/javascript'> //<![CDATA[ // Social sharing popups. var postEl = document.getElementsByClassName('social-wrapper'); var postCount = postEl.length; for(i=0; i<postCount;i++){ postEl[i].addEventListener("click", function(event){ var postUrl = this.getAttribute("data-href"); window.open( postUrl,'popUpWindow','height=500,width=500,left=10,top=10,resizable=yes,scrollbars=yes,toolbar=yes,menubar=no,location=no,directories=no,status=yes'); });} //]]> </script> <script type='text/javascript'> //<![CDATA[ var BreakpointHandler = function() { this.initted = false; this.isHomePage = false; this.isMobile = false; }; BreakpointHandler.prototype.finalizeSummary = function(summaryHtml, lastNode) { // Use $.trim for IE8 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