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Firefox 110 was released on February 14, 2023.</p></div><section aria-labelledby="changes_for_web_developers"><h2 id="changes_for_web_developers"><a href="#changes_for_web_developers">Changes for web developers</a></h2><div class="section-content"></div></section><section aria-labelledby="html"><h3 id="html"><a href="#html">HTML</a></h3><div class="section-content"><p>No notable changes.</p></div></section><section aria-labelledby="css"><h3 id="css"><a href="#css">CSS</a></h3><div class="section-content"><ul> <li> Container queries and container query length units are now supported by default. For more information on these queries and the related units of length, see the <a href="/en-US/docs/Web/CSS/CSS_containment/Container_queries#container_query_length_units">CSS Container Queries</a> documentation (<a href="https://bugzil.la/1809720" class="external" target="_blank">Firefox bug 1809720</a>). </li> <li>The <a href="/en-US/docs/Web/CSS/@media/color-gamut">color-gamut media query</a> is now supported (<a href="https://bugzil.la/1422237" class="external" target="_blank">Firefox bug 1422237</a>).</li> <li>The <a href="/en-US/docs/Web/HTML/Element/datalist#color_type"><code>list</code></a> attribute is supported in <code><input></code> elements with <code>type="color"</code> on Windows and Linux (<a href="https://bugzil.la/960984" class="external" target="_blank">Firefox bug 960984</a>).</li> <li>The <a href="/en-US/docs/Web/CSS/@page"><code>@page</code></a> at-rule now supports named pages, which allows a user to create page breaks for specific selectors using the <a href="/en-US/docs/Web/CSS/page"><code>page</code></a> property (<a href="https://bugzil.la/1787947" class="external" target="_blank">Firefox bug 1787947</a>)</li> </ul></div></section><section aria-labelledby="javascript"><h3 id="javascript"><a href="#javascript">JavaScript</a></h3><div class="section-content"><ul> <li> Serialization of <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error#error_types">native Error types</a> now includes the <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/stack"><code>stack</code></a> property in workers when using <a href="/en-US/docs/Web/API/Worker/postMessage"><code>Worker.postMessage()</code></a> and <a href="/en-US/docs/Web/API/Window/structuredClone" title="structuredClone()"><code>structuredClone()</code></a>. With this addition, cloning native error stacks now works for all methods that use the <a href="/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm">structured clone algorithm</a>, in both the main thread and workers. (See <a href="https://bugzil.la/1774866" class="external" target="_blank">Firefox bug 1774866</a> for more details.) </li> </ul></div></section><section aria-labelledby="apis"><h3 id="apis"><a href="#apis">APIs</a></h3><div class="section-content"><ul> <li> <p> The <code>midi</code> permission of the <a href="/en-US/docs/Web/API/Permissions_API">Permission API</a> is now supported. This allows the permission status for using the <a href="/en-US/docs/Web/API/Web_MIDI_API">Web MIDI API</a> to be queried using <a href="/en-US/docs/Web/API/Permissions/query"><code>navigator.permissions.query()</code></a> (<a href="https://bugzil.la/1772166" class="external" target="_blank">Firefox bug 1772166</a>). </p> </li> <li> <p><a href="/en-US/docs/Web/API/ReadableStream"><code>ReadableStream</code></a> now supports <a href="/en-US/docs/Web/API/ReadableStream#async_iteration">asynchronous iteration over the chunks in a stream</a> using the <code>for await...of</code> syntax (<a href="https://bugzil.la/1734244" class="external" target="_blank">Firefox bug 1734244</a>).</p> </li> <li> <p> WebRTC now supports sending the set of available encodings when adding a transceiver to a peer connection, and also getting the active encoding associated with a sender. Specifically, <a href="/en-US/docs/Web/API/RTCPeerConnection/addTransceiver"><code>RTCPeerConnection.addTransceiver()</code></a> now supports using the <a href="/en-US/docs/Web/API/RTCPeerConnection/addTransceiver#sendencodings"><code>sendEncodings</code></a> option in the <a href="/en-US/docs/Web/API/RTCPeerConnection/addTransceiver#init"><code>init</code></a> parameter object, and <code>active</code> can be used to determine whether or not the encoding is being used to send data. (See <a href="https://bugzil.la/1676855" class="external" target="_blank">Firefox bug 1676855</a> for more details.) </p> </li> <li> <p>WebRTC methods <a href="/en-US/docs/Web/API/RTCRtpSender/getParameters"><code>RTCRtpSender.getParameters()</code></a>, <a href="/en-US/docs/Web/API/RTCRtpSender/setParameters"><code>RTCRtpSender.setParameters()</code></a>, and <a href="/en-US/docs/Web/API/RTCRtpReceiver/getParameters"><code>RTCRtpReceiver.getParameters()</code></a> are now compliant with the specification (<a href="https://bugzil.la/1401592" class="external" target="_blank">Firefox bug 1401592</a>).</p> </li> </ul> <h4 id="dom">DOM</h4> <ul> <li> <p><a href="/en-US/docs/Web/API/CSSContainerRule"><code>CSSContainerRule</code></a> is supported, allowing JavaScript to access the name and query used in an <a href="/en-US/docs/Web/CSS/@container"><code>@container</code></a> at-rule definition (<a href="https://bugzil.la/1787173" class="external" target="_blank">Firefox bug 1787173</a>).</p> </li> <li> <p> Elements now lose focus if a style is applied that makes them ineligible to hold focus, such as <code>hidden</code>, and the <a href="/en-US/docs/Web/API/Element/blur_event"><code>blur</code> event</a> is fired. Focus then moves to the viewport. Previously focus would remain with the element. (See <a href="https://bugzil.la/1810077" class="external" target="_blank">Firefox bug 1810077</a> for more details.) </p> </li> </ul></div></section><section aria-labelledby="webdriver_conformance_webdriver_bidi_marionette"><h3 id="webdriver_conformance_webdriver_bidi_marionette"><a href="#webdriver_conformance_webdriver_bidi_marionette">WebDriver conformance (WebDriver BiDi, Marionette)</a></h3><div class="section-content"><h4 id="webdriver_bidi">WebDriver BiDi</h4> <ul> <li> <p>Added support for the <code>network.beforeRequestSent</code> (<a href="https://bugzil.la/1790368" class="external" target="_blank">Firefox bug 1790368</a>), the <code>network.responseStarted</code> (<a href="https://bugzil.la/1790370" class="external" target="_blank">Firefox bug 1790370</a>), and the <code>network.responseCompleted</code> (<a href="https://bugzil.la/1790372" class="external" target="_blank">Firefox bug 1790372</a>) events.</p> </li> <li> <p>Added support for the <code>browsingContext.captureScreenshot</code> command to capture full page screenshots (<a href="https://bugzil.la/1800086" class="external" target="_blank">Firefox bug 1800086</a>).</p> </li> <li> <p>Added support for serialization and deserialization of generic platform objects (<a href="https://bugzil.la/1792524" class="external" target="_blank">Firefox bug 1792524</a>), and for <code>NodeList</code> and <code>HTMLCollection</code> platform objects (<a href="https://bugzil.la/1802284" class="external" target="_blank">Firefox bug 1802284</a>).</p> </li> <li> <p>Added a <code>timestamp</code> field to the <code>browsingContext.domContentLoaded</code> and <code>browsingContext.load</code> events (<a href="https://bugzil.la/1790378" class="external" target="_blank">Firefox bug 1790378</a>).</p> </li> <li> <p>Added a <code>type</code> field to the response for <code>script.evaluate</code> and <code>script.callFunction</code> to indicate either <code>success</code> or <code>exception</code> results (<a href="https://bugzil.la/1803599" class="external" target="_blank">Firefox bug 1803599</a>).</p> </li> </ul> <h4 id="marionette">Marionette</h4> <ul> <li> <p>The cache for known nodes (element and shadow root references) has been moved from the parent to the web content process following recent WebDriver classic changes (<a href="https://bugzil.la/1692468" class="external" target="_blank">Firefox bug 1692468</a>).</p> </li> <li> <p>Improved the JSON serialization and deserialization algorithms to be compliant with the WebDriver classic specification (<a href="https://bugzil.la/1794078" class="external" target="_blank">Firefox bug 1794078</a>).</p> </li> </ul></div></section><section aria-labelledby="changes_for_add-on_developers"><h2 id="changes_for_add-on_developers"><a href="#changes_for_add-on_developers">Changes for add-on developers</a></h2><div class="section-content"><ul> <li>Added the <code>"webRequestFilterResponse"</code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/permissions#api_permissions">API permission</a>. This permission provides access to <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest/filterResponseData"><code>webRequest.filterResponseData</code></a>. This permission can be provided as an optional permission. See <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest/filterResponseData"><code>webRequest.filterResponseData</code></a> for more information on using this permission (<a href="https://bugzil.la/1809235" class="external" target="_blank">Firefox bug 1809235</a>).</li> <li>The <code>defaultZoomFactor</code> property of <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/ZoomSettings"><code>tabs.ZoomSettings</code></a> now returns the value of the default zoom factor setting (<a href="https://bugzil.la/1772166" class="external" target="_blank">Firefox bug 1772166</a>)</li> </ul></div></section><section aria-labelledby="older_versions"><h2 id="older_versions"><a href="#older_versions">Older versions</a></h2><div class="section-content"><div class="multiColumnList"> <ul> <li><a href="/en-US/docs/Mozilla/Firefox/Releases/109">Firefox 109 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/108">Firefox 108 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/107">Firefox 107 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/106">Firefox 106 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/105">Firefox 105 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/104">Firefox 104 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/103">Firefox 103 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/102">Firefox 102 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/101">Firefox 101 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/100">Firefox 100 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/99">Firefox 99 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/98">Firefox 98 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/97">Firefox 97 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/96">Firefox 96 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/95">Firefox 95 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/94">Firefox 94 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/93">Firefox 93 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/92">Firefox 92 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/91">Firefox 91 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/90">Firefox 90 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/89">Firefox 89 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/88">Firefox 88 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/87">Firefox 87 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/86">Firefox 86 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/85">Firefox 85 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/84">Firefox 84 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/83">Firefox 83 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/82">Firefox 82 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/81">Firefox 81 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/80">Firefox 80 for developers</a></li><li><a href="/en-US/docs/Mozilla/Firefox/Releases/79">Firefox 79 for developers</a></li> </ul> </div></div></section></article><aside class="article-footer"><div class="article-footer-inner"><div class="svg-container"><svg xmlns="http://www.w3.org/2000/svg" width="162" height="162" viewBox="0 0 162 162" fill="none" role="none"><mask id="b" fill="#fff"><path d="M97.203 47.04c8.113-7.886 18.004-13.871 28.906-17.492a78 78 0 0 1 33.969-3.39c11.443 1.39 22.401 5.295 32.024 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Content available under <a href="/en-US/docs/MDN/Writing_guidelines/Attrib_copyright_license">a Creative Commons license</a>.</p></div></div></footer></div><script type="application/json" id="hydration">{"url":"/en-US/docs/Mozilla/Firefox/Releases/110","doc":{"isMarkdown":true,"isTranslated":false,"isActive":true,"flaws":{},"title":"Firefox 110 for developers","mdn_url":"/en-US/docs/Mozilla/Firefox/Releases/110","locale":"en-US","native":"English (US)","sidebarHTML":"\n <ol>\n <li class=\"toggle\">\n <details>\n <summary>Firefox releases</summary>\n <ol>\n <li><a href=\"/en-US/docs/Mozilla/Firefox/Releases\">Firefox release notes for developers</a></li>\n <li><a href=\"/en-US/docs/Mozilla/Firefox/Experimental_features\">Experimental features in Firefox</a></li>\n </ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Add-ons</summary>\n <ol>\n <li><a href=\"/en-US/docs/Mozilla/Add-ons/WebExtensions\">Browser extensions</a></li>\n <li><a href=\"https://extensionworkshop.com/documentation/themes/\">Themes</a></li>\n </ol>\n </details>\n </li>\n <li>\n <a href=\"https://firefox-source-docs.mozilla.org/\">Firefox documentation</a>\n </li>\n </ol>\n","sidebarMacro":"FirefoxSidebar","body":[{"type":"prose","value":{"id":null,"title":null,"isH3":false,"content":"<p>This article provides information about the changes in Firefox 110 that will affect developers. Firefox 110 was released on February 14, 2023.</p>"}},{"type":"prose","value":{"id":"changes_for_web_developers","title":"Changes for web developers","isH3":false,"content":""}},{"type":"prose","value":{"id":"html","title":"HTML","isH3":true,"content":"<p>No notable changes.</p>"}},{"type":"prose","value":{"id":"css","title":"CSS","isH3":true,"content":"<ul>\n <li>\n Container queries and container query length units are now supported by default.\n For more information on these queries and the related units of length, see the <a href=\"/en-US/docs/Web/CSS/CSS_containment/Container_queries#container_query_length_units\">CSS Container Queries</a> documentation (<a href=\"https://bugzil.la/1809720\" class=\"external\" target=\"_blank\">Firefox bug 1809720</a>).\n </li>\n <li>The <a href=\"/en-US/docs/Web/CSS/@media/color-gamut\">color-gamut media query</a> is now supported (<a href=\"https://bugzil.la/1422237\" class=\"external\" target=\"_blank\">Firefox bug 1422237</a>).</li>\n <li>The <a href=\"/en-US/docs/Web/HTML/Element/datalist#color_type\"><code>list</code></a> attribute is supported in <code><input></code> elements with <code>type=\"color\"</code> on Windows and Linux (<a href=\"https://bugzil.la/960984\" class=\"external\" target=\"_blank\">Firefox bug 960984</a>).</li>\n <li>The <a href=\"/en-US/docs/Web/CSS/@page\"><code>@page</code></a> at-rule now supports named pages, which allows a user to create page breaks for specific selectors using the <a href=\"/en-US/docs/Web/CSS/page\"><code>page</code></a> property (<a href=\"https://bugzil.la/1787947\" class=\"external\" target=\"_blank\">Firefox bug 1787947</a>)</li>\n</ul>"}},{"type":"prose","value":{"id":"javascript","title":"JavaScript","isH3":true,"content":"<ul>\n <li>\n Serialization of <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error#error_types\">native Error types</a> now includes the <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/stack\"><code>stack</code></a> property in workers when using <a href=\"/en-US/docs/Web/API/Worker/postMessage\"><code>Worker.postMessage()</code></a> and <a href=\"/en-US/docs/Web/API/Window/structuredClone\" title=\"structuredClone()\"><code>structuredClone()</code></a>.\n With this addition, cloning native error stacks now works for all methods that use the <a href=\"/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm\">structured clone algorithm</a>, in both the main thread and workers.\n (See <a href=\"https://bugzil.la/1774866\" class=\"external\" target=\"_blank\">Firefox bug 1774866</a> for more details.)\n </li>\n</ul>"}},{"type":"prose","value":{"id":"apis","title":"APIs","isH3":true,"content":"<ul>\n <li>\n <p>\n The <code>midi</code> permission of the <a href=\"/en-US/docs/Web/API/Permissions_API\">Permission API</a> is now supported.\n This allows the permission status for using the <a href=\"/en-US/docs/Web/API/Web_MIDI_API\">Web MIDI API</a> to be queried using <a href=\"/en-US/docs/Web/API/Permissions/query\"><code>navigator.permissions.query()</code></a> (<a href=\"https://bugzil.la/1772166\" class=\"external\" target=\"_blank\">Firefox bug 1772166</a>).\n </p>\n </li>\n <li>\n <p><a href=\"/en-US/docs/Web/API/ReadableStream\"><code>ReadableStream</code></a> now supports <a href=\"/en-US/docs/Web/API/ReadableStream#async_iteration\">asynchronous iteration over the chunks in a stream</a> using the <code>for await...of</code> syntax (<a href=\"https://bugzil.la/1734244\" class=\"external\" target=\"_blank\">Firefox bug 1734244</a>).</p>\n </li>\n <li>\n <p>\n WebRTC now supports sending the set of available encodings when adding a transceiver to a peer connection, and also getting the active encoding associated with a sender.\n Specifically, <a href=\"/en-US/docs/Web/API/RTCPeerConnection/addTransceiver\"><code>RTCPeerConnection.addTransceiver()</code></a> now supports using the <a href=\"/en-US/docs/Web/API/RTCPeerConnection/addTransceiver#sendencodings\"><code>sendEncodings</code></a> option in the <a href=\"/en-US/docs/Web/API/RTCPeerConnection/addTransceiver#init\"><code>init</code></a> parameter object, and <code>active</code> can be used to determine whether or not the encoding is being used to send data.\n (See <a href=\"https://bugzil.la/1676855\" class=\"external\" target=\"_blank\">Firefox bug 1676855</a> for more details.)\n </p>\n </li>\n <li>\n <p>WebRTC methods <a href=\"/en-US/docs/Web/API/RTCRtpSender/getParameters\"><code>RTCRtpSender.getParameters()</code></a>, <a href=\"/en-US/docs/Web/API/RTCRtpSender/setParameters\"><code>RTCRtpSender.setParameters()</code></a>, and <a href=\"/en-US/docs/Web/API/RTCRtpReceiver/getParameters\"><code>RTCRtpReceiver.getParameters()</code></a> are now compliant with the specification (<a href=\"https://bugzil.la/1401592\" class=\"external\" target=\"_blank\">Firefox bug 1401592</a>).</p>\n </li>\n</ul>\n<h4 id=\"dom\">DOM</h4>\n<ul>\n <li>\n <p><a href=\"/en-US/docs/Web/API/CSSContainerRule\"><code>CSSContainerRule</code></a> is supported, allowing JavaScript to access the name and query used in an <a href=\"/en-US/docs/Web/CSS/@container\"><code>@container</code></a> at-rule definition (<a href=\"https://bugzil.la/1787173\" class=\"external\" target=\"_blank\">Firefox bug 1787173</a>).</p>\n </li>\n <li>\n <p>\n Elements now lose focus if a style is applied that makes them ineligible to hold focus, such as <code>hidden</code>, and the <a href=\"/en-US/docs/Web/API/Element/blur_event\"><code>blur</code> event</a> is fired.\n Focus then moves to the viewport.\n Previously focus would remain with the element.\n (See <a href=\"https://bugzil.la/1810077\" class=\"external\" target=\"_blank\">Firefox bug 1810077</a> for more details.)\n </p>\n </li>\n</ul>"}},{"type":"prose","value":{"id":"webdriver_conformance_webdriver_bidi_marionette","title":"WebDriver conformance (WebDriver BiDi, Marionette)","isH3":true,"content":"<h4 id=\"webdriver_bidi\">WebDriver BiDi</h4>\n<ul>\n <li>\n <p>Added support for the <code>network.beforeRequestSent</code> (<a href=\"https://bugzil.la/1790368\" class=\"external\" target=\"_blank\">Firefox bug 1790368</a>), the <code>network.responseStarted</code> (<a href=\"https://bugzil.la/1790370\" class=\"external\" target=\"_blank\">Firefox bug 1790370</a>), and the <code>network.responseCompleted</code> (<a href=\"https://bugzil.la/1790372\" class=\"external\" target=\"_blank\">Firefox bug 1790372</a>) events.</p>\n </li>\n <li>\n <p>Added support for the <code>browsingContext.captureScreenshot</code> command to capture full page screenshots (<a href=\"https://bugzil.la/1800086\" class=\"external\" target=\"_blank\">Firefox bug 1800086</a>).</p>\n </li>\n <li>\n <p>Added support for serialization and deserialization of generic platform objects (<a href=\"https://bugzil.la/1792524\" class=\"external\" target=\"_blank\">Firefox bug 1792524</a>), and for <code>NodeList</code> and <code>HTMLCollection</code> platform objects (<a href=\"https://bugzil.la/1802284\" class=\"external\" target=\"_blank\">Firefox bug 1802284</a>).</p>\n </li>\n <li>\n <p>Added a <code>timestamp</code> field to the <code>browsingContext.domContentLoaded</code> and <code>browsingContext.load</code> events (<a href=\"https://bugzil.la/1790378\" class=\"external\" target=\"_blank\">Firefox bug 1790378</a>).</p>\n </li>\n <li>\n <p>Added a <code>type</code> field to the response for <code>script.evaluate</code> and <code>script.callFunction</code> to indicate either <code>success</code> or <code>exception</code> results (<a href=\"https://bugzil.la/1803599\" class=\"external\" target=\"_blank\">Firefox bug 1803599</a>).</p>\n </li>\n</ul>\n<h4 id=\"marionette\">Marionette</h4>\n<ul>\n <li>\n <p>The cache for known nodes (element and shadow root references) has been moved from the parent to the web content process following recent WebDriver classic changes (<a href=\"https://bugzil.la/1692468\" class=\"external\" target=\"_blank\">Firefox bug 1692468</a>).</p>\n </li>\n <li>\n <p>Improved the JSON serialization and deserialization algorithms to be compliant with the WebDriver classic specification (<a href=\"https://bugzil.la/1794078\" class=\"external\" target=\"_blank\">Firefox bug 1794078</a>).</p>\n </li>\n</ul>"}},{"type":"prose","value":{"id":"changes_for_add-on_developers","title":"Changes for add-on developers","isH3":false,"content":"<ul>\n <li>Added the <code>\"webRequestFilterResponse\"</code><a href=\"/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/permissions#api_permissions\">API permission</a>. This permission provides access to <a href=\"/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest/filterResponseData\"><code>webRequest.filterResponseData</code></a>. This permission can be provided as an optional permission. See <a href=\"/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest/filterResponseData\"><code>webRequest.filterResponseData</code></a> for more information on using this permission (<a href=\"https://bugzil.la/1809235\" class=\"external\" target=\"_blank\">Firefox bug 1809235</a>).</li>\n <li>The <code>defaultZoomFactor</code> property of <a href=\"/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/ZoomSettings\"><code>tabs.ZoomSettings</code></a> now returns the value of the default zoom factor setting (<a href=\"https://bugzil.la/1772166\" class=\"external\" target=\"_blank\">Firefox bug 1772166</a>)</li>\n</ul>"}},{"type":"prose","value":{"id":"older_versions","title":"Older versions","isH3":false,"content":"<div class=\"multiColumnList\">\n <ul>\n <li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/109\">Firefox 109 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/108\">Firefox 108 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/107\">Firefox 107 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/106\">Firefox 106 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/105\">Firefox 105 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/104\">Firefox 104 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/103\">Firefox 103 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/102\">Firefox 102 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/101\">Firefox 101 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/100\">Firefox 100 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/99\">Firefox 99 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/98\">Firefox 98 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/97\">Firefox 97 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/96\">Firefox 96 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/95\">Firefox 95 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/94\">Firefox 94 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/93\">Firefox 93 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/92\">Firefox 92 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/91\">Firefox 91 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/90\">Firefox 90 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/89\">Firefox 89 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/88\">Firefox 88 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/87\">Firefox 87 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/86\">Firefox 86 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/85\">Firefox 85 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/84\">Firefox 84 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/83\">Firefox 83 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/82\">Firefox 82 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/81\">Firefox 81 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/80\">Firefox 80 for developers</a></li><li><a href=\"/en-US/docs/Mozilla/Firefox/Releases/79\">Firefox 79 for developers</a></li>\n </ul>\n</div>"}}],"toc":[{"text":"Changes for web developers","id":"changes_for_web_developers"},{"text":"Changes for add-on developers","id":"changes_for_add-on_developers"},{"text":"Older versions","id":"older_versions"}],"summary":"This article provides information about the changes in Firefox 110 that will affect developers. Firefox 110 was released on February 14, 2023.","popularity":0,"modified":"2024-09-26T23:32:56.000Z","other_translations":[{"locale":"de","title":"Firefox 110 für Entwickler","native":"Deutsch"},{"locale":"ja","title":"Firefox 110 for developers","native":"日本語"}],"pageType":"firefox-release-notes","source":{"folder":"en-us/mozilla/firefox/releases/110","github_url":"https://github.com/mdn/content/blob/main/files/en-us/mozilla/firefox/releases/110/index.md","last_commit_url":"https://github.com/mdn/content/commit/8b6cec0ceff01e7a9d6865cf5306788e15cce4b8","filename":"index.md"},"short_title":"Firefox 110 for developers","parents":[{"uri":"/en-US/docs/Mozilla","title":"Mozilla"},{"uri":"/en-US/docs/Mozilla/Firefox","title":"Firefox"},{"uri":"/en-US/docs/Mozilla/Firefox/Releases","title":"Firefox release notes for developers"},{"uri":"/en-US/docs/Mozilla/Firefox/Releases/110","title":"Firefox 110 for developers"}],"pageTitle":"Firefox 110 for developers - Mozilla | MDN","noIndexing":false}}</script></body></html>