139.0.1$$$Firefox Release$$$May 29; 2025$$$$$$Version 139.0.1; first offered to Release channel users on May 29; 2025$$$$$$Fixed$$$Fixed graphics corruption with certain NVIDIA graphics adapters and multiple monitors running at mixed refresh rates after updating to Firefox 139. (Bug 1968876)

138.0.4$$$Firefox Release$$$May 17; 2025$$$Version 138.0.4; first offered to Release channel users on May 17; 2025$$$$$$Fixed$$$Security fixes.

138.0.3$$$Firefox Release$$$May 13; 2025$$$$$$Version 138.0.3; first offered to Release channel users on May 13; 2025$$$$$$Fixed$$$Fixed a crash that could occur when viewing websites that use WebGL. (Bug 1961191)$$$$$$Fixed an issue where the browser could repeatedly crash when certain SVG effects (like blur or drop shadow) were applied to very small areas. (Bug 1924241)$$$$$$On Linux; fixed an issue where video playback would appear washed-out on Wayland when HDR support was unavailable. (Bug 1961610)$$$$$$Fixed an issue where the Match Case shortcut Alt+C in the find-in-page toolbar did not toggle the checkbox as expected. (Bug 1952611)

138.0.1$$$Firefox Release$$$May 1; 2025$$$Version 138.0.1; first offered to Release channel users on May 1; 2025$$$FIXED$$$Fixed an issue which caused a blank page to be shown for Home and New Tab pages for some users. (Bug 1963537)$$$Added a workaround for a bug in outlook.office.com/outlook.live.com where attachment filenames are incorrectly prefixed with UTF-8 when saved. (Bug 1961710)

138.0$$$Firefox Release$$$April 29; 2025$$$$$$Version 138.0; first offered to Release channel users on April 29; 2025$$$$$$New$$$Profile management helps protect your privacy and stay focused by separating your online life into distinct profiles — for work; school; vacation planning; or whatever you choose. You can now name your profiles and customize them with avatars and color themes for easy recognition; then quickly switch between them — all while keeping bookmarks; tabs; and browsing history completely separate.$$$$$$A Firefox browser window labelled “Choose a Firefox profile” with options to select a green “work” profile with a briefcase avatar or a lavender “personal” profile with a flower avatar; create a new profile; or set a specific profile when Firefox opens.$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$Users in the United States can now trigger weather suggestions in the address bar! Simply type a weather-related term or a city name; and view the result directly in the address bar dropdown.$$$$$$Screenshot of the feature$$$$$$Currently available in: United States$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$Tab Groups; a new way to organize and take control of your tabs; is now available to almost all users worldwide. You can create a group by dragging one tab onto another; pausing; then dropping it. You can also now reposition a tab group on the tab bar by dragging it.$$$$$$Firefox on Windows 11 now uses acrylic-style menus for popup windows; which better match the operating system’s aesthetic.$$$$$$You can now copy links from background tabs using the tabstrip context menu on MacOS and Linux.$$$$$$$$$Fixed$$$Various security fixes.$$$$$$$$$Changed$$$Improved the address and credit card autofill experience to better handle forms that update dynamically as users input information. Autofill now correctly fills newly revealed fields—such as those shown after selecting a country.$$$$$$Rededicated previous color settings to Contrast Control settings. (Learn more)$$$$$$$$$Enterprise$$$You can find information about policy updates and enterprise specific bug fixes in the Firefox for Enterprise 138 Release Notes.$$$$$$$$$Developer$$$Developer Information$$$Added support for the import map integrity field; allowing you to ensure the integrity of dynamically or statically imported modules.$$$$$$Implemented support for Error.isError; enabling brand checks to determine whether an object is an instance of Error. (Learn more)$$$$$$Added support for the error.captureStackTrace extension to improve compatibility with other browsers. (Learn more)$$$$$$A new column has been added to the Network panel to display the full path of the request URL. This enhancement makes helps developers quickly view and analyze complete request paths.$$$$$$Firefox now applies a uniform user agent (UA) style to <h1> elements; regardless of whether they are used inside <article>; <aside>; <nav>; or <section>. (Learn more)$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$$$$Web Platform$$$Added support for Import Attributes; allowing developers to specify additional metadata when importing modules.$$$$$$Applications can now set their preferred degradation method to be used when the configured frame rate and resolution cannot be maintained. (Learn more)$$$$$$Firefox now enables the cache directive for the Clear-Site-Data header; allowing websites to clear the network cache. This gives websites more control over stored data; such as clearing the cache during logout to help mitigate privacy risks. (Learn more)$$$$$$$$$Unresolved$$$Due to recent changes in Chrome on Windows; some users might find that the Firefox migration wizard no longer successfully imports passwords from Chrome or Chrome-based browsers. As a workaround; you can export your passwords as a CSV file from Chrome and then import them into Firefox using either the migration wizard or the Firefox password manager.$$$$$$$$$Co

Fixed$$$Fixed file picker not being displayed when exporting passwords on macOS in about:logins for some users. (Bug 1956266)$$$Fixed accessibility issues with the new PDF signature feature. (Bug 1956110 and Bug 1952571)$$$Fixed an issue where using the context menu to paste in the Style Editor would insert the code twice. (Bug 1955854)$$$Fixed functional regressions in our XSLT support introduced in 137. (Bug 1954841)$$$Fixed a tooltip flickering issue on Windows that affected some users when hovering. (Bug 1958631)$$$Fixed an issue where Firefox would not respond to clicks in some HTML5 video players. (Bug 1959251)$$$Fixed an issue where radio inputs behaved incorrectly when preventDefault() was called on the click event. (Bug 1957956)$$$Fixed an issue that caused some Firefox users to restart their browser multiple times to complete an update. (Bug 1959492)$$$Security fix.$$$Changed$$$Fixed an issue with DRM video playback on some sites caused by the general availability rollout of Microsofts PlayReady hardware decryption DRM support in Firefox 137. PlayReady support is now limited to specific sites while broader compatibility continues to be tested. (Bug 1959827)

Version 137.0.1; first offered to Release channel users on April 8; 2025$$$Fixed an issue where folder shortcuts on Windows were incorrectly treated as files during file uploads; preventing selecting files within the target folder. (Bug 1958222)$$$Fixed a crash experienced by Windows users when downloading files with Qihoo 360 Total Security Antivirus software installed. (Bug 1958112)$$$Fixed an occasional startup crash. (Bug 1958293)

Version 137.0; first offered to Release channel users on April 1; 2025$$$$$$Tab groups are now available! Stay organized by grouping related tabs. Drag one tab onto another to create a group; name it; color-code it; and it will always be saved. You can close and reopen groups anytime.$$$Firefox Address Bar Refresh 2025 - new ways to search for things new; previously viewed; and more - all from the address bar:$$$$$$Features$$$Unified Search Button: A new; easy-to-access button in the address bar helps you switch between search engines and search modes with ease. This feature brings the simplicity of mobile Firefox to your desktop experience.$$$Search Term Persistence: Now when you refine a search in the address bar; the original term sticks around; making it easier to adjust your queries and find exactly what youre looking for.$$$Secondary Action Buttons: Suggestions for common Firefox features.$$$Contextual Search Mode: Firefox detects if you are on a page that has search capability and offers that option for you to directly search with the page engine from the address bar. Use this option at least 2 times and Firefox will suggest adding the search engine to your Firefox.$$$Contextual Search Engine Options: Use a Contextual Search mode option at least 2 times and Firefox will suggest adding the search engine to your Firefox so that it’s always available to you.$$$Intuitive Search Keywords: You can access various address bar search modes with convenient and descriptive keywords (e.g. @bookmarks;@tabs;@history; @actions).Firefox now identifies all links in PDFs and turns them into hyperlinks.$$$Support HEVC playback on Linux.$$$Now you can sign PDFs without leaving Firefox. Save your signatures to re-use later.$$$You can now use the Firefox address bar as a calculator. Simply type an arithmetic expression and view the result in the address bar drop-down. Clicking on this result will copy it to your clipboard.$$$Various security fixes.

136.0.4$$$Firefox Release$$$March 27; 2025$$$$$$Version 136.0.4; first offered to Release channel users on March 27; 2025$$$$$$Fixed$$$Security fix.

136.0.3$$$Firefox Release$$$March 25; 2025$$$$$$Version 136.0.3; first offered to Release channel users on March 25; 2025$$$$$$Fixed$$$Significantly improved responsiveness on TikTok by improving the speed of date formatting. (Bug 1954323)

136.0.2$$$Firefox Release$$$March 18; 2025$$$$$$Version 136.0.2; first offered to Release channel users on March 18; 2025$$$$$$Fixed$$$Fixed a bug where Cookies and site data and Temporary cached files and pages were unexpectedly enabled after updating to Firefox 136 for users with History and/or Site settings set to clear on shutdown in previous versions. (Bug 1952564)$$$$$$Affected users already on Firefox 136 can disable these settings in Privacy & Security.$$$$$$Fixed an issue where the Primary Password prompt appeared in unexpected situations. (Bug 1946121)$$$$$$Fixed visibility issues with radio buttons on dark backgrounds. (Bug 1951930)$$$$$$Fixed high CPU usage on Windows when the screen was locked or the laptop lid was closed. (Bug 1924932)

136.0.1$$$Firefox Release$$$March 11; 2025$$$$$$Version 136.0.1; first offered to Release channel users on March 11; 2025$$$$$$Fixed$$$Fixed an issue where a cookie size limit caused problems with website cookie management when using the CookieStore API. This could cause login and other state-related issues. (Bug 1950565)$$$$$$Fixed an issue where Control/Command+L did not focus the address bar in new windows. (Bug 1947723)

136.0$$$Firefox Release$$$March 4; 2025$$$$$$Version 136.0; first offered to Release channel users on March 4; 2025$$$$$$New$$$You can now enable the updated Firefox sidebar in Settings > General > Browser Layout to quickly access multiple tools in one click; without leaving your main view. Sidebar tools include an AI chatbot of your choice; bookmarks; history; and tabs from devices you sync with your Mozilla account.$$$$$$screenshot Firefox browser with the sidebar enabled and the customize sidebar settings displaying the various settings$$$$$$Keep a lot of tabs open? Try our new vertical tabs layout to quickly scan your list of tabs. With vertical tabs; your open and pinned tabs appear in the sidebar instead of along the top of the browser. To turn on vertical tabs; right-click on the toolbar near the top of the browser and select Turn on Vertical Tabs. If you’ve enabled the updated sidebar; you can also go to Customize sidebar and check Vertical tabs. Early testers report feeling more organized after using vertical tabs for a few days.$$$$$$screenshot of the firefox browser with vertical tabs enabled$$$$$$The Clear browsing data and cookies dialog now allows clearing saved form info separately from browsing history.$$$$$$screenshot of the Clear browsing data and cookies dialog. Demonstrating the separate options for form data and browsing history$$$$$$Smartblock Embeds allows users to selectively unblock certain social media embeds that are blocked in ETP Strict and Private Browsing modes. Currently; support is limited to a few embed types; with more to be added in future updates.$$$$$$Firefox now upgrades page loads to HTTPS by default and gracefully falls back to HTTP if the secure connection fails. This behavior is known as HTTPS-First.$$$$$$On macOS; some background tabs will be moved to lower power cores; reducing energy usage.$$$$$$Hardware-accelerated playback of HEVC video content is now supported on macOS.$$$$$$Hardware video decoding is now enabled for AMD GPUs on Linux.$$$$$$On Linux; Firefox is now available on ARM64 (AArch64); with installation options via APT and tarballs. Flatpak support is coming soon.$$$$$$The Weather forecast on the New Tab page is expanding to additional regions; including Mexico; Brazil; Argentina; and Chile; as part of an ongoing regional rollout.$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$Address autofill enabled for users in the United Kingdom.$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$$$$Fixed$$$Firefox will now prefer the PNG format when copying images out of Firefox; allowing the preservation of transparency.$$$$$$Various security fixes.$$$$$$$$$Changed$$$For New Tab stories; the Save to Pocket action was moved from a button to the context menu along with other actions; such as Bookmark.$$$$$$The macOS DMG installer packages now use LZMA for compression; reducing download size and installation time.$$$$$$Due to recent changes in macOS Sequoia; the shortcut for completing search strings to .com addresses has been changed from Ctrl+Enter to Cmd+Enter.

135.0$$$Firefox Release$$$February 4; 2025$$$$$$Version 135.0; first offered to Release channel users on February 4; 2025$$$$$$New$$$Firefox Translations now supports more languages than ever! Pages in Simplified Chinese; Japanese; and Korean can now be translated and Russian is now available as a target language for translating into.$$$$$$The credit card autofill feature is now being gradually rolled out to all users globally.$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$AI Chatbot access is now being gradually rolled out to all users. To use this optional feature; choose AI Chatbot from the sidebar or from Firefox Labs. Then; complete the provider selection to see the chat interface become available on the sidebar.$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$Firefox now enforces certificate transparency; requiring web servers to provide sufficient proof that their certificates were publicly disclosed before they will be trusted. This only affects servers using certificates issued by a certificate authority in Mozillas Root CA Program.$$$$$$Additionally; the CRLite certificate revocation checking mechanism is also being gradually rolled out; substantially improving the performance of these checks.$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$Firefox now includes safeguards to prevent sites from abusing the history API by generating excessive history entries; which can make navigating with the back and forward buttons difficult by cluttering the history. This intervention ensures that such entries; unless interacted with by the user; are skipped when using the back and forward buttons.$$$$$$Users on macOS and Linux are now given the option to close only the current tab if the Quit keyboard shortcut is used while multiple tabs are open in the window.$$$$$$$$$Fixed$$$Made improvements to the Translations feature which will reduce the likelihood that models will invent new; made-up words under some circumstances.$$$$$$Various security fixes.$$$$$$$$$Changed$$$The refreshed New Tab layout previously rolled out in Firefox 134 to users in the United States is now being made available in all countries where Stories are available. It features a repositioned logo to prioritize Web Search; Shortcuts; and Recommended Stories at the top. The update also includes changes to the card UI for recommended stories and allows users with larger screens to see up to four columns for better use of space.

134.0.2$$$Firefox Release$$$January 21; 2025$$$$$$Version 134.0.2; first offered to Release channel users on January 21; 2025$$$$$$Fixed$$$Fixed crash reporter not being displayed for some localized builds (Bug 1940763).$$$$$$Fixed a regression in Firefox 134 where anchored links in HTML framesets pointing to local files did not work (Bug 1934807).$$$$$$Fixed an issue in developer tools preventing the resending of network requests when debugging extensions (Bug 1934478).$$$$$$Fixed an issue where data consumption from service workers may unexpectedly halt (Bug 1941210)

134.0.1$$$Firefox Release$$$January 14; 2025$$$$$$Version 134.0.1; first offered to Release channel users on January 14; 2025$$$$$$Fixed$$$Fixed UI hangs happening on YouTube and Google Docs in some situations (Bug 1939295).$$$$$$Fixed a startup crash affecting some users upgrading from Firefox 133 (Bug 1941134).$$$$$$Fixed an issue where search engines selection menus and context menus could be broken if a user had previously reverted to an earlier version (Bug 1940533).

134.0$$$Firefox Release$$$January 7; 2025$$$$$$Version 134.0; first offered to Release channel users on January 7; 2025$$$$$$New$$$Firefox now supports touchpad hold gestures on Linux. This means that kinetic (momentum) scrolling can now be interrupted by placing two fingers on the touchpad.$$$$$$Hardware-accelerated playback of HEVC video content is now supported on Windows.$$$$$$Ecosias availability has been expanded to all languages in the German region along with Austria; Belgium; Italy; Netherlands; Spain; Sweden and Switzerland.

133.0$$$Firefox Release$$$November 26; 2024$$$$$$Version 133.0; first offered to Release channel users on November 26; 2024$$$$$$New$$$Firefox now has a new anti-tracking feature; Bounce Tracking Protection; which is now available in Enhanced Tracking Protections Strict mode. This feature detects bounce trackers based on their redirect behavior and periodically purges their cookies and site data to block tracking.$$$$$$The sidebar to view tabs from other devices can now be opened via the Tab overview menu.$$$$$$screenshot of the Tab Overview menu showing the tabs from other devices menu entry$$$$$$GPU-accelerated Canvas2D is now enabled by default on Windows providing a performance improvement.$$$$$$$$$Fixed$$$Various security fixes.$$$$$$The “Picture-in-Picture: auto-open on tab switch” feature from Firefox Labs now behaves more reliably across a wider range of sites; automatically opening relevant videos while ignoring others.$$$$$$$$$Changed$$$When server time is available; the expire attribute value is adjusted by adding the difference between the server and local times. If the current time is set in the future; cookies that have not expired according to the server time are considered valid.$$$$$$$$$Enterprise$$$You can find information about policy updates and enterprise specific bug fixes in the Firefox for Enterprise 133 Release Notes.$$$$$$$$$Developer$$$Developer Information$$$Firefox now supports the keepalive option in the Fetch API. This feature allows developers to make HTTP requests that can continue to run even after the page is unloaded; such as during page navigation or closing.$$$$$$Firefox now supports the Permissions API in Worker Context.$$$$$$Firefox now dispatches beforetoggle events just before a dialog opens and toggle events after the dialog closes; matching the behavior of popovers.$$$$$$Methods are now available on UInt8Array to convert to and from Base64 and hexadecimal encodings. This is an implementation of a Stage 3 TC39 proposal; for more details see the proposal text.$$$$$$Added support for image decoding as part of the WebCodecs API. This allows for decoding of images from the main and worker threads.$$$$$$$$$Community Contributions$$$With the release of Firefox 133; we are pleased to welcome the developers who contributed their first code change to Firefox in this release; 16 of whom were brand new volunteers! Please join us in thanking each of these diligent and enthusiastic individuals; and take a look at their contributions:$$$$$$abhijeetchawla[:ff2400t]: 1810429; 1810480; 1810482; 1810483; 1810485; 1810486; 1855165; 1855168$$$bootleq: 1905331$$$Chizoba ODINAKA: 1918731$$$Christian Liebel: 1921633$$$Collin Richards: 1086524$$$Diego Ciudad Real: 1853990; 1878737$$$gasc: 1868303$$$Jason: 1882316$$$Lukasz Gniadzik [:lgniadzik]: 1926280$$$Maxime Thiebaut: 1915982$$$Oliver Old [:oold]: 1640243$$$psychpsyo: 1837773$$$Serah Nderi: 1923710; 1923737; 1924202; 1924608$$$Syed Bariman Jan: 1918706; 1918734; 1922523$$$tanishkasingh2004: 1922593; 1923190$$$tawanda: 1918735; 1923146

132.0.2$$$Firefox Release$$$November 12; 2024$$$$$$Version 132.0.2; first offered to Release channel users on November 12; 2024$$$$$$Fixed$$$Fixed possible errors when playing encrypted media content through some streaming providers. (Bug 1929491)$$$$$$Added a mitigation to help reduce the frequency of duplicated push notifications reported by some users. (Bug 1928868)$$$$$$Fixed hangs when printing from some sites when using the system print dialog. (Bug 1898184)$$$$$$Fixed a crash which could occur when using Microsoft SSO on macOS. (Bug 1929622)$$$$$$Fixed a crash in the Network Monitor developer tool which could occur in some circumstances. (Bug 1924882)

132.0.1$$$Firefox Release$$$November 4; 2024$$$$$$Version 132.0.1; first offered to Release channel users on November 4; 2024$$$$$$Fixed$$$Fixed issues causing intermittent video playback problems on some sites. (Bug 1928484; Bug 1928798)$$$$$$Fixed an issue causing themes to reset to default after restarting Firefox; in particular when using the Firefox Color add-on. (Bug 1928082)

132.0$$$Firefox Release$$$October 29; 2024$$$$$$Version 132.0; first offered to Release channel users on October 29; 2024$$$$$$New$$$Microsoft PlayReady encrypted media playback is now being rolled out to select sites on Windows. Through this support; we are gradually rolling out a 1080p baseline and 4K Ultra HD support with key streaming partners. An added benefit is that viewers get less battery drain and better performance when streaming their favorite movies and shows.$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$Wide Color Gamut WebGL is now available for Windows and macOS users! With this support; Firefox is bringing a richer; more vivid range of colors to the videos; games; and images on your screen. This implementation currently supports wider color (P3) profiles in 8-bit.$$$$$$WebRender hardware accelerated rendering is now enabled for most SVG filter primitives; improving performance for certain graphics-heavy content. Accelerated filters are feBlend; feColorMatrix; feComponentTransfer; feComposite; feDropShadow; feFlood; feGaussianBlur; feMerge and feOffset.$$$$$$Added support for macOS’ new screen and window sharing selection features on macOS 15 and later. Support for macOS 14 will be added in a future release.$$$$$$The macOS session resume feature has been enhanced. Firefox will now automatically relaunch if it was open before a system restart; like after an OS update.$$$$$$Firefox now blocks third-party cookie access when Enhanced Tracking Protections Strict mode is enabled.$$$$$$$$$Fixed$$$Various security fixes.$$$$$$$$$Changed$$$As a follow-up to our work to upgrade mixed content starting with Firefox 127; HTTP-favicons will now also be blocked if they can not be received over HTTPS instead.$$$$$$The Copy Without Site Tracking option is now grayed out when no known tracking parameters are found within the link. Additionally; more tracking parameter support has been added for websites such as LinkedIn and Shopee. Please report tracking parameters that arent removed by filing a bug in Bugzilla.$$$$$$$$$Enterprise$$$You can find information about policy updates and enterprise specific bug fixes in the Firefox for Enterprise 132 Release Notes.$$$$$$$$$Developer$$$Developer Information$$$Support for HTTP/2 Push has been removed due to compatibility issues with various sites. This feature is not currently supported by any other major browser.$$$$$$Console logging in service workers is now functional again. The console.log API can be used within active service workers and the output inspected in the Console panel of the Developer Tools toolbox.$$$$$$Support for debugging remote devices via USB has also been restored. Simply go to about:debugging; plug in your phone using a USB cable; and refresh the device list. The phone will now appear correctly in the list.$$$$$$$$$Web Platform$$$Added support for a post-quantum key exchange mechanism for TLS 1.3 (mlkem768x25519) which secures communications against advanced / long-term threats.$$$$$$Added support for Certificate Compression which reduces the size and increases the speed of a TLS handshake.$$$$$$Text directionality computation has been updated to follow the latest model defined in the HTML specification; improving interoperability with other web browsers.$$$$$$The requestVideoFrameCallback() method is now available on the HTMLVideoElement interface. This method enables developers to perform efficient operations on each video frame.$$$$$$The getCapabilities method allows applications to gather the media capabilities supported for the live MediaStreamTrack.$$$$$$The fetchpriority attribute enables web developers to optimize resource loading by specifying the relative priority of resources to be fetched by the browser. It accepts three values: auto (default priority); low (lower priority); high (higher priority). It can be specified on script; link; img elements; on the RequestInit parameter of the fetch() method and Link response headers. The HTML specification leaves t

131.0.2$$$Firefox Release$$$October 9; 2024$$$$$$Version 131.0.2; first offered to Release channel users on October 9; 2024$$$$$$Fixed$$$Security fix.

131.0$$$Firefox Release$$$October 1; 2024$$$$$$Version 131.0; first offered to Release channel users on October 1; 2024$$$$$$New$$$Firefox will now offer to temporarily remember when users grant permissions to sites (e.g. geolocation). Temporary permissions will be removed either after one hour or when the tab is closed.$$$$$$permission-option$$$$$$A tab preview is now displayed when hovering the mouse over background tabs; making it easier to locate the desired tab without needing to switch tabs.$$$$$$screenshot of a preview image displayed under a background tab when you mouse over the tab$$$$$$When suggesting a default translation language; Firefox will now take into consideration languages you have previously used for translations.$$$$$$We’ve re-introduced the ability to navigate to the search engine home page when the search bar is empty by using shift-enter/shift-click.$$$$$$$$$Fixed$$$Various security fixes.$$$$$$$$$Changed$$$The following language is now supported by Firefox translation:$$$$$$Swedish$$$The Tab overview (List all tabs) menu has received a new; refreshed icon.$$$$$$$$$Enterprise$$$You can find information about policy updates and enterprise specific bug fixes in the Firefox for Enterprise 131 Release Notes.$$$$$$$$$Developer$$$Developer Information$$$As part of the ongoing updates to SVG 2; SVGGraphicsElement.nearestViewportElement and SVGGraphicsElement.farthestViewportElement have been officially removed. Please note that these properties have had deprecation warnings since February.$$$$$$Firefox now supports text fragments; which allows users to link directly to a specific portion of text in a web document via a special URL fragment. (Learn more)$$$$$$$$$Web Platform$$$SameSite=None cookies will now be rejected when there is no Secure attribute included.$$$$$$Support for Cookies Having Independent Partitioned State (CHIPS) was now added; allowing developers to opt a cookie into storage partitioned per top-level site. (Learn more)$$$$$$$$$Community Contributions$$$With the release of Firefox 131; we are pleased to welcome the developers who contributed their first code change to Firefox in this release; 15 of whom were brand new volunteers! Please join us in thanking each of these diligent and enthusiastic individuals; and take a look at their contributions:$$$$$$Alex T: 1634192; 1896774$$$Anthony Mclamb: 1911118$$$c8ef: 1911403$$$Chris [:godtamit]: 1915265$$$Dan: 1850682; 1859328$$$Gatlin Newhouse: 1909999$$$Kavin: 1868305$$$Luca Niccoli: 1759936$$$Robert Holdsworth: 1703127; 1910611$$$Shashi Sugrim: 1913090$$$shubhampharande8: 490753$$$Stefan Richter: 1409262$$$superstuff: 1583811$$$wildbydesign: 1884814$$$Yanis Lagha: 381283; 1910161; 1910167; 1912513

130.0.1$$$Firefox Release$$$September 17; 2024$$$$$$Version 130.0.1; first offered to Release channel users on September 17; 2024$$$$$$Fixed$$$Fixed a recent regression causing some UI elements to be rendered as left-to-right instead of right-to-left for users of our Saraiki localization. (Bug 1917175)$$$$$$Linux: Fixed black rendering of AVIF images when Firefox is built with GCC. (Bug 1916038)$$$$$$$$$Enterprise$$$Added an enterprise policy to disable the Firefox Labs section in Settings. (Bug 1911826)

130.0$$$Firefox Release$$$September 3; 2024$$$$$$Version 130.0; first offered to Release channel users on September 3; 2024$$$$$$New$$$Firefox now allows translating selected text portions to different languages after a full-page translation.$$$$$$Screenshot of the modal dialog for Selected text translation$$$$$$Firefox now offers an easy way to try experimental features with a new Firefox Labs page in Settings.$$$$$$AI Chatbot feature lets you add the chatbot of your choice to the sidebar; for quick access as you browse.$$$Picture-in-Picture auto-open experiment enables PiP on active videos when switching tabs.$$$Screenshot of the new Firefox Labs section in Settings$$$$$$Overscroll animations are now enabled as the default behavior for scrollable areas on Linux.$$$$$$$$$Fixed$$$Various security fixes.$$$$$$Fixed an issue where Copy and Paste context menu items intermittently were not enabled when expected.

129.0.2$$$Firefox Release$$$August 20; 2024$$$$$$Version 129.0.2; first offered to Release channel users on August 20; 2024$$$$$$Fixed$$$Fixed an issue with screen readers prompting Alert when hovering over tabs. (Bug 1908873)$$$$$$Fixed an issue where drag-and-drop operations would not work as expected with extensions that rely on this functionality. (Bug 1911486)

129.0$$$Firefox Release$$$August 6; 2024$$$$$$Version 129.0; first offered to Release channel users on August 6; 2024$$$$$$New$$$Reader View now has an enhanced Text and Layout menu with new options for character spacing; word spacing; and text alignment. These changes offer a more accessible reading experience.$$$$$$screenshot of reader views text menu demonstrating the new spacing and layout options$$$$$$Reader View now has a Theme menu with additional Contrast and Gray options. You can also select custom colors for text; background; and links from the Custom tab.$$$$$$screenshot of reader views theme menu demonstrating the new theme options$$$$$$A tab preview is now displayed when hovering the mouse over background tabs; making it easier to locate the desired tab without needing to switch tabs.$$$$$$screenshot of a preview image displayed under a background tab when you mouse over the tab$$$$$$$$$This feature is part of a progressive roll out.$$$$$$What is a progressive roll out?$$$HTTPS is replacing HTTP as the default protocol in the address bar on non-local sites. If a site is not available via HTTPS; Firefox will fall back to HTTP.$$$$$$HTTPS DNS records can now be resolved with the operating systems DNS resolver on specific platforms (Windows 11; Linux; Android 10+). Previously this required DNS over HTTPS to be enabled. This capability allows the use of HTTP/3 without needing to use the Alt-Svc header; upgrades requests to HTTPS when the DNS record is present; and enables wider use of ECH.$$$$$$Added support for multiple languages in the same document spoken in macOS VoiceOver.$$$$$$Address Autofill is now enabled for users in France and Germany.$$$$$$$$$Fixed$$$Various security fixes.

128.0.2$$$Firefox Release$$$July 23; 2024$$$$$$Version 128.0.2; first offered to Release channel users on July 23; 2024$$$$$$Fixed$$$Fixed an audio echo in video calls on macOS under certain conditions. (Bug 1908539)$$$$$$Fixed an issue where the Adguard extension popup was not displaying. (Bug 1906132)$$$$$$Fixed an issue causing some screen readers to fail to read when navigating by character in rich text editors. (Bug 1905021)$$$$$$Fixed visual glitches when dark mode is enabled in Windows ARM devices. (Bug 1897444)$$$$$$Fixed an issue causing NTLM authentication failure. (Bug 1908115)$$$$$$Fixed an issue where content displayed on mouseover was not captured in a screenshot. (Bug 1905468)$$$$$$Various stability fixes.

127.0.2$$$Firefox Release$$$June 25; 2024$$$$$$Version 127.0.2; first offered to Release channel users on June 25; 2024$$$$$$Fixed$$$Fixed an issue where YouTube playback may experience stalling under certain conditions (bug 1900191; bug 1878510).$$$$$$Fixed an issue where the Private Window icon was displayed in the taskbar on Windows when browser.privateWindowSeparation.enabled was set to false (bug 1901840).

126.0$$$Firefox Release$$$May 14; 2024$$$$$$Version 126.0; first offered to Release channel users on May 14; 2024$$$$$$New$$$The Copy Without Site Tracking option can now remove parameters from nested URLs. It also includes expanded support for blocking over 300 tracking parameters from copied links; including those from major shopping websites. Keep those trackers away when sharing links!$$$Firefox now supports Content-encoding: zstd (zstandard compression). This is an alternative to broti and gzip compression for web content; and can provide higher compression levels for the same CPU used; or conversely lower server CPU use to get the same compression. This is heavily used on sites such as Facebook.$$$$$$Catalan is now available in Firefox Translations.$$$$$$Enabled AV1 hardware decode acceleration on macOS for M3 Macs.$$$$$$Telemetry was added to create an aggregate count of searches by category to broadly inform search feature development. These categories are based on 20 high-level content types; such as sports;” business; and travel. This data will not be associated with specific users and will be collected using OHTTP to remove IP addresses as potentially identifying metadata. No profiling will be performed; and no data will be shared with third parties. (read more)$$$$$$$$$Fixed$$$Various security fixes.$$$$$$$$$Changed$$$The URL Paste Suggestion feature added in Fx125 was temporarily disabled while the team investigates a potential performance issue. The feature will be re-enabled in a future release once the performance issue is addressed.

125.0.3$$$Firefox Release$$$April 29; 2024$$$$$$Version 125.0.3; first offered to Release channel users on April 29; 2024$$$$$$Fixed$$$Fixed an extra blank tab with an address of https://0.0.0.1 sometimes appearing when attempting to launch Firefox when it is already running (bug 1892612).$$$$$$Fixed an issue that could cause incorrect font selection in some situations for users with the Japanese locale set (bug 1892363).$$$$$$Fixed text corruption when dragging text containing unicode characters on Linux systems (bug 1888202).$$$$$$Fixed a correctness error when checking arguments.length (and not using arguments otherwise) inside of a generator or async function (bug 1892699).$$$$$$Fixed an issue that could lead to inconsistent focus handling of <select> elements when opened (bug 1893177).

125.0.2$$$Firefox Release$$$April 22; 2024$$$$$$Version 125.0.2; first offered to Release channel users on April 22; 2024$$$$$$Fixed$$$Reverted the changes recently shipped in Firefox 125 that more proactively blocked downloads from potentially untrustworthy URLs. The changes caused unexpected problems with downloading files in some situations. We plan to fix and re-enable these protections in a future release. (Bug 1892069)

124.0.2$$$Firefox Release$$$April 2; 2024$$$$$$Version 124.0.2; first offered to Release channel users on April 2; 2024$$$$$$Fixed$$$Fixed an issue where users with a large amount of bookmarks would be unable to restore a bookmarks backup. (Bug 1884308)$$$$$$Fixed an issue that would cause open Firefox windows to go blank or crash during video playback on sites such as Netflix. (Bug 1883932)$$$$$$Fixed a crash that affected Linux AArch64 builds.(Bug 1866396)$$$$$$Fixed an issue where some users experienced difficulties loading webpages due to changes made to the default AppArmor configuration shipping in Ubuntu 24.04. (Bug 1884347)$$$$$$

124.0.1$$$Firefox Release$$$March 22; 2024$$$$$$Version 124.0.1; first offered to Release channel users on March 22; 2024$$$$$$Fixed$$$Security fixes.

123.0.1$$$Firefox Release$$$March 5; 2024$$$$$$Version 123.0.1; first offered to Release channel users on March 5; 2024$$$$$$Fixed$$$Fixed the Firefox Translation language indicator in the address bar displaying a colored square icon instead of the language code icon. (Bug 1879415)$$$$$$Fixed incorrect rendering of Canvas2D conic gradients colors on Windows. (Bug 1851963)$$$$$$Fixed a regression with the onChange event not firing when clearing the value of a textarea HTML field. (Bug 1881457)$$$$$$Fixed availability of system-level dictionaries for Linux users with Firefox installed as a Flatpak package. (Bug 1881830)$$$$$$Fixed a regression in the JavaScript JIT engine incorrectly inlining strings in some cases. (Bug 1882386)$$$$$$Fixed low contrast of text when selecting rows in the Developer tools Storage panel. (Bug 1877090)

123.0$$$Firefox Release$$$February 20; 2024$$$$$$Version 123.0; first offered to Release channel users on February 20; 2024$$$$$$New$$$We’ve integrated search into Firefox View. You can now search through all of the tabs on each of the section subpages - Recent Browsing; Open Tabs; Recently Closed Tabs; Tabs from other devices; or History.$$$$$$Having any issues with a website on Firefox; yet the site seems to be working as expected on another browser? You can now let us know via the Web Compatibility Reporting Tool! By filing a web compatibility issue; you’re directly helping us detect; target; and fix the most impacted sites to make your browsing experience on Firefox smoother.$$$$$$$$$Fixed$$$When translating web pages; we are now also translating text in tooltips (i.e. titles) and text displayed in form controls (i.e. placeholder).$$$$$$Various security fixes.

122.0$$$Firefox Release$$$January 23; 2024$$$$$$Version 122.0; first offered to Release channel users on January 23; 2024$$$$$$New$$$Firefox now displays images and descriptions for search suggestions when provided by the search engine.$$$$$$screenshot of a search suggestion displaying images and descriptions$$$$$$The translations feature received an improvement in the quality of translated webpages. The results should be much more stable. This fixes issues where the content of a page could disappear when translated; or interactive widgets could break.$$$$$$Firefox now supports creating and using passkeys stored in the iCloud Keychain on macOS.$$$$$$MDN Web Docs article suggestions from Firefox Suggest will be available in the address bar for users searching for web development-related information.$$$$$$The line breaking rules of Web content now match the Unicode Standard. This improves Web Browser compatibility for line breaking. An additional improvement for East Asian and South East Asian end users; Firefox now supports proper language-aware word selection when double-clicking on text for languages including Chinese; Japanese; Burmese; Lao; Khmer; and Thai.$$$$$$Firefox now ships with a new .deb package for Linux users on Ubuntu; Debian; and Linux Mint.$$$$$$$$$Fixed$$$Various security fixes.$$$$$$$$$Enterprise$$$You can find information about policy updates and enterprise specific bug fixes in the Firefox for Enterprise 122 Release Notes.$$$$$$$$$Developer$$$Developer Information$$$Fixing keyboard navigation in Inspector Rules view. Starting with Firefox 122; when editing a selector; a property name; or a property value in the Inspector; the Enter key will no longer move the focus to the next input but will validate what was entered and focus the matching element (#1861674). You can still use Ctrl + Enter (Cmd + Enter on macOS) or Tab to validate and move the focus to the next input.$$$$$$$$$Web Platform$$$Enabled the offset-position property which is useful for most of the offset-path values. Added support for ray(); basic-shape; coord-box to the offset-path CSS property. Added support for rect() and xywh() basic shapes on clip-path and offset-path CSS properties.$$$$$$Firefox now supports animating the SVG viewBox attribute using SMIL by animations.$$$by animations are animations that are relative to the original value. Other attributes such as lengths and angles already support by; but a viewBox consists of four separate values.$$$$$$The LargestContentfulPaint API has been added; this provides timing information about the largest image or text paint before users interact with a web page.$$$$$$hr in select is now supported; allowing websites to easily use separators inside a select element.$$$$$$The showPicker method is now supported on <select> elements; this can be used to trigger the drop-down behavior via JavaScript.$$$$$$The fallback URL parser for unknown schemes was changed to DefaultURI; this improves specification adherence and web compatibility.$$$$$$Enabled the ArrayBuffer.prototype.transfer proposal methods; which enables transferring ownership of ArrayBuffer data.$$$$$$Added support for the Screen Wake Lock API.$$$$$$Firefox now recognizes the “webauthn” autocomplete token and will suggest passkeys in form autofill dialogs.$$$$$$Scripts can now store cacheAPI data in Private Browsing mode. Previously; user experience for someone browsing in private browsing mode could be significantly different than in regular mode. With these changes; websites can store cacheAPI data in Private Mode moving towards a uniform experience in regular vs Private Browsing mode.$$$$$$To further protect user privacy; Firefox now taints filters that use currentColor as an input. Since color can be set by the :visited pseudo selector; it potentially contains privacy-sensitive information and therefore these primitives must be marked as tainted. This means that if you use such a filter; you won’t be able to read the filter output from canvas.$$$$$$Uneven Level Protection Forward Error Correct

121.0.1$$$Firefox Release$$$January 9; 2024$$$$$$Version 121.0.1; first offered to Release channel users on January 9; 2024$$$$$$Fixed$$$Fixed unexpected line wrapping in some CJK contexts caused by changes in ideographic space handling. (Bug 1870973)$$$$$$Fixed a hang when loading sites containing column-based layouts under some circumstances. (Bug 1867784)$$$$$$Fixed missing rounded corners for videos playing over another video. (Bug 1869994)$$$$$$Fixed Firefox not closing properly and other applications being unable to use a USB security key after being previously used during a Firefox session. (Bug 1863135)

121.0$$$Firefox Release$$$December 19; 2023$$$$$$Version 121.0; first offered to Release channel users on December 19; 2023$$$$$$New$$$Firefox now prompts Windows users to install the Microsoft AV1 Video Extension to enable hardware decoding support for the AV1 video codec from about:support if not already installed.$$$$$$Firefox now supports Voice Control commands on macOS systems.$$$$$$On Linux; Firefox now defaults to the Wayland compositor when available instead of XWayland. This brings support for touchpad & touchscreen gestures; swipe-to-nav; per-monitor DPI settings; better graphics performance; and more.$$$$$$Note that due to Wayland protocol limitations; Picture-in-Picture windows require an extra user interaction (generally right-click on the window) or a shell / desktop-environment tweak. See bug 1621261 for related discussion and tracking; this post for a KDE configuration; and this extension for GNOME. It is also a known issue that windows are not correctly placed when restoring a previous session on launch.$$$$$$Firefox can now force links to always be underlined. This option can be enabled in the Browsing section of the Firefox Settings menu.$$$$$$Screenshot of new Always underline links option$$$$$$The PDF viewer now includes a floating button to simplify deleting drawings; text; and images added in PDFs.$$$$$$Screenshot of new floating delete button$$$$$$$$$Fixed$$$Various security fixes.

120.0.1$$$Firefox Release$$$November 30; 2023$$$$$$Version 120.0.1; first offered to Release channel users on November 30; 2023$$$$$$Fixed$$$Fixed a bug that was causing persistent startup slowdowns. (bug 1867095)$$$$$$Fixed an issue that was causing 100% CPU usage on sites such as Google Maps. (bug 1866409)$$$$$$Fixed an issue that was causing YouTube videos to show a green screen when hardware acceleration was enabled. (bug 1865928)$$$$$$Fixed an issue where the status bar was still visible when viewing fullscreen video. (bug 1853896)$$$$$$Fixed a startup crash affecting Linux users on some aarch64 systems with page sizes other than 4KB. (bug 1866025)

120.0$$$Firefox Release$$$November 21; 2023$$$$$$Version 120.0; first offered to Release channel users on November 21; 2023$$$$$$New$$$Firefox supports a new “Copy Link Without Site Tracking” feature in the context menu which ensures that copied links no longer contain tracking information.