Download Mozilla Firefox (en-US)

Pin this version: winget install --id Mozilla.Firefox --version 159.0 --exact

Version 159.0, first offered to Release channel users on October 27, 2026 New - Sharing on macOS now uses the native macOS share picker, which shows a preview of the page and recent contacts alongside AirDrop, Messages, and other apps. Several selected tabs can also be shared at once. - Saved passwords are now available from the sidebar by default, without having to add the Passwords tool first. - Smart Window can now watch pages for changes such as price drops or restocks. Type /watch in the chat to set one up, and Firefox sends a desktop notification when it finds a match. Watches can be managed from the Tasks button in the toolbar or the about:smartwindowtasks page. This feature is part of a progressive roll out. What is a progressive roll out? Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience. Fixed - Fixed the file upload dialog opening in the last folder a file was saved to, such as Downloads, instead of the folder last used for uploads. - Fixed memory usage growing rapidly when sites such as the Zoom web app were left open in a minimized window. - Fixed some videos displaying incorrectly on Windows when NVIDIA RTX Video HDR is enabled. - Fixed bookmarks not being imported from Google Chrome profiles that are signed in to a Google account. - Fixed the…

Release notes

Manifest: manifests/m/Mozilla/Firefox/159.0

Pin this version: winget install --id Mozilla.Firefox --version 158.0.1 --exact

Version 158.0.1, first offered to Release channel users on October 20, 2026 Fixed - Mozilla blocked compromised eMudhra intermediate certificates via OneCRL on October 17th. The blocks were distributed to clients via Remote Settings the same day. This update contains the updated OneCRL block list, ensuring clients will block the compromised certificates even if RemoteSettings is disabled by policy or otherwise unavailable in the user's network environment. (Learn More) - Fixed an issue where pages would unexpectedly scroll back to the top when selecting text. (Bug 2081016) - Fixed a crash on Windows when printing or saving a page as PDF while a screen reader or other assistive technology was running. (Bug 2082376) - Fixed an issue where Firefox was opening windows on the wrong monitor in multi-monitor setups on Linux. (Bug 2076558) - Fixed an issue that could prevent the built-in VPN from turning on for some users. (Bug 2055094) - Fixed an issue where files dragged into Firefox from other applications were not dropped onto the page on macOS. (Bug 2078954) - Various security fixes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/158.0.1

Pin this version: winget install --id Mozilla.Firefox --version 158.0 --exact

Version 158.0, first offered to Release channel users on October 13, 2026 New - You can now fill in forms faster in Smart Window. When clicking into a form field or selecting Fill from sources, Smart Window will now suggest data to use based on your relevant open tabs and saved autofill data. This feature is part of a progressive roll out. What is a progressive roll out? Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience. - Firefox now creates more accessible PDFs when saving a page as PDF, and when printing on Linux and macOS. This also fixes a variety of PDF rendering issues, such as missing math symbols. - Firefox now supports the JPEG XL image format, which generally has better compression than WebP, JPEG, PNG, and GIF. - New Tab now keeps a library of custom wallpapers under Your images, rather than only the most recent one. - Firefox's translations feature now supports the following languages: - Albanian - Belarusian - Filipino Fixed - Fixed website icons (favicons) in address bar results blending into the highlight color when selecting a result with the keyboard on Ubuntu's default theme. - Fixed a crash that could occur while Firefox loaded website icons (favicons). - Fixed the first letter of each search engine's name being underlined in the Unified Search…

Release notes

Manifest: manifests/m/Mozilla/Firefox/158.0

Pin this version: winget install --id Mozilla.Firefox --version 157.0.1 --exact

Version 157.0.1, first offered to Release channel users on October 6, 2026 Fixed - Fixed downloads failing on macOS when Firefox is set to ask where to save files but doesn't have permission to access the Downloads folder. (Bug 2077390) - Fixed the sidebar getting stuck on the Bookmarks or AI Chatbot panel for some users. (Bug 2076296) - Fixed the Restore from Backup option not appearing during onboarding on Windows. (Bug 2073401) - Security fix. - Reference link to 157.0 release notes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/157.0.1

Pin this version: winget install --id Mozilla.Firefox --version 157.0 --exact

Version 157.0, first offered to Release channel users on September 29, 2026 New - Firefox's biggest visual refresh in years is now available, with a modernized look across the browser toolbars, sidebar, menus and individual features, built with our updated design system. It also includes: - New built-in themes with light and dark versions, to personalize the look of Firefox in one click. - A new compact mode that reduces toolbar and tab spacing to leave more room for web content, useful on smaller screens and in split-screen layouts. - WebRTC video calls can now use hardware AV1 decoding on devices that support it, instead of always decoding AV1 video in software. - Firefox now shows a warning in the site information panel (the shield icon in the address bar) and in Settings when it has been set up to record its encryption keys, which could let other software on the computer read encrypted web traffic. - Firefox Suggest now offers suggestions in the address bar in Austria, Belgium, Czech Republic, Denmark, Finland, Hungary, Ireland, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, and Switzerland. They can be controlled in the Firefox Suggest settings. Learn more. Fixed - Fixed video from phones and tablets appearing sideways or upside down in WebRTC calls. - Fixed the address bar searching for the typed text instead of opening the selected suggestion when a page was still loading, such as shortly after Firefox started. - Fixed some HDR videos…

Release notes

Manifest: manifests/m/Mozilla/Firefox/157.0

Pin this version: winget install --id Mozilla.Firefox --version 156.0.1 --exact

Version 156.0.1, first offered to Release channel users on September 22, 2026 Fixed - Fixed the NVDA screen reader not announcing address bar buttons when the mouse pointer moves over them. (Bug 2069276) - Fixed elements inside a link not showing their CSS :active styles while being clicked. (Bug 2067272) - Fixed Firefox becoming unresponsive on some pages that use CSS anchor positioning. (Bug 2070171) - Fixed Firefox windows on macOS 27 immediately returning to maximized after being restored by double-clicking the title bar. (Bug 2066632) - Fixed Firefox leaking system handles on Windows as content processes were started and stopped. (Bug 2069644) - Reference link to 156.0 release notes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/156.0.1

Pin this version: winget install --id Mozilla.Firefox --version 156.0 --exact

Version 156.0, first offered to Release channel users on September 15, 2026 New - Firefox on macOS can now be set to open automatically when the computer starts up, from the Startup section of Settings. - Localized Wikipedia and occasional sponsored suggestions in the address bar are now available in France, Germany, and Italy. These suggestions can be turned off in Firefox Suggest settings. Fixed - Fixed an issue where dragging an image to a new position in a rich-text editor could replace it with a long line of text instead of moving it. - Fixed high-sample-rate FLAC audio in MP4 failing to play on sites such as Bilibili. - Fixed subtitles not appearing in the Picture-in-Picture window when they are turned on in the video player after the window has already opened. - Fixed bookmarks moving out of their folder when the folder and the bookmarks inside it were selected and dragged together in the Bookmarks sidebar. - Fixed the find bar becoming permanently unavailable in a tab after reversing the panes in Split View. - Fixed some sites failing to load when DNS over HTTPS is enabled and the site does not support HTTPS. - Fixed Firefox losing all network connectivity for some users with the built-in VPN enabled. - Fixed an issue on Windows where Firefox could block an auto-hiding taskbar from showing. - Various security fixes. Changed - Firefox's built-in PDF viewer now starts up to 45% faster. - Improved memory and CPU usage when Firefox displays large JPEG images scaled down…

Release notes

Manifest: manifests/m/Mozilla/Firefox/156.0

Pin this version: winget install --id Mozilla.Firefox --version 155.0.1 --exact

Version 155.0.1, first offered to Release channel users on September 4, 2026 Fixed - Fixed Firefox becoming unresponsive on some pages that use CSS blur and backdrop filters together. (Bug 2068836) - Fixed the sidebar not reappearing after restarting Firefox when the "Hide tabs and sidebar" option was turned on. (Bug 2065431) - Fixed some profile icons not being displayed in the account and application menus. (Bug 2064729, Bug 2067734) - Fixed the current device being listed among connected devices in the account menu. (Bug 2059763) - Reference link to 155.0 release notes. Unresolved - Standard dynamic range (SDR) video in some formats can appear washed out on macOS. The issue is under investigation and a fix will ship in a future release. (Bug 2068961)

Release notes

Manifest: manifests/m/Mozilla/Firefox/155.0.1

Pin this version: winget install --id Mozilla.Firefox --version 155.0 --exact

Version 155.0, first offered to Release channel users on September 1, 2026 New - Smart Window is now available for all users in the USA, Canada, and France to try out! Additionally, Firefox 155 includes many new enhancements: - New personalized resume conversation starters help users quickly return to topics they’ve been working on. - Assistant now responds much faster with Exa web search source citations to provide accurate, trustworthy web grounding in roughly 1/5 the time. - Organize Tabs now suggests better groupings of your related tabs and gives each group a clearer, more descriptive name. This feature is part of a progressive roll out. What is a progressive roll out? Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience. - Firefox now shows how many trackers it has blocked in the address bar, making built-in privacy protections easier to see while browsing. The count can be hidden in settings without turning off tracker blocking. This feature is part of a progressive roll out. What is a progressive roll out? Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better…

Release notes

Manifest: manifests/m/Mozilla/Firefox/155.0

Pin this version: winget install --id Mozilla.Firefox --version 154.0.1 --exact

Version 154.0.1, first offered to Release channel users on August 25, 2026 Fixed - Fixed slower access to saved passwords and unexpected Primary Password prompts caused by recent changes to password storage. (Bug 2064411, Bug 2065593, Bug 2063993) - Fixed an issue where addresses were failing to autofill on some sites. (Bug 2065145, Bug 2063599) - Fixed Firefox adding a new Start Menu shortcut on Windows every time it started. (Bug 2064652) - Fixed an issue where connections to local network devices were failing without a permission prompt on some sites loaded over HTTP. (Bug 2059274) - Fixed a crash that could occur when opening intranet sites that are configured to link to files on a local network share. (Bug 2064648) - Fixed an issue on Windows where tab titles were cut off at the start when the system font was MS UI Gothic. (Bug 2056856) - Reference link to 154.0 release notes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/154.0.1

Pin this version: winget install --id Mozilla.Firefox --version 154.0 --exact

Version 154.0, first offered to Release channel users on August 18, 2026 New - Firefox's Local Network Access protections now extend to WebSocket connections. Websites that try to open a WebSocket to a device on the local network will now ask for permission first. - In Smart Window, Firefox can now suggest groups of related tabs and propose a name for each group. This feature is part of a progressive roll out. What is a progressive roll out? Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience. - Local Firefox profile backups are now available on macOS in addition to Windows and Linux, and backups can be restored across all three platforms. - Sites can now be exempted from having their cookies and site data cleared on shutdown without also being exempted from tracking protection and other cookie restrictions. - The full-page Translations feature now translates <iframe> content. - The full-page Translations feature now runs language identification on all page loads, resulting in an improved experience for offering translations to users. - Windows users can now choose a different Firefox app icon in Settings. This is not yet available for MSIX installations, macOS, or Linux, but is coming soon. - The address bar now includes a Manage AI quick action that opens the AI…

Release notes

Manifest: manifests/m/Mozilla/Firefox/154.0

Pin this version: winget install --id Mozilla.Firefox --version 153.0.4 --exact

We're still preparing the notes for this release, and will post them here when they are ready. Please check back later.

Release notes

Manifest: manifests/m/Mozilla/Firefox/153.0.4

Pin this version: winget install --id Mozilla.Firefox --version 153.0.3 --exact

Version 153.0.3, first offered to Release channel users on August 4, 2026 New - Smart Window includes several enhancements: - The suggestion list now shows more results, making it easier to find history and switch to open tabs. (Bug 2019042) - The assistant can now answer questions directly using web search results from Exa, instead of handing off to a search engine. (Bug 2046183, Bug 2044385) This feature is part of a progressive roll out. What is a progressive roll out? Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience. Fixed - Fixed audio and video failing to play, or hanging when seeking, on websites that load media from a Blob URL. (Bug 2056444) - Fixed Internet shortcuts dragged from Firefox to the desktop being marked as untrusted on Windows, which caused a security warning every time they were opened. (Bug 2056865) - Fixed the Bookmarks, History, and other sidebars failing to open when the sidebar is hidden and the password manager has been turned off by an enterprise policy. (Bug 2056857) - Fixed a Mozilla VPN upgrade offer appearing for people in regions where Mozilla VPN is not sold. (Bug 2058264) - Fixed frequent Inspector crashes in the Developer Tools on pages where an extension content script had added event listeners. (Bug 2042101) - Fixed a rare…

Release notes

Manifest: manifests/m/Mozilla/Firefox/153.0.3

Pin this version: winget install --id Mozilla.Firefox --version 153.0.1 --exact

Version 153.0.1, first offered to Release channel users on July 28, 2026 Fixed - Addressed a startup crash on Windows that could occur after updating Firefox, when some of the application's internal files could not be loaded. Firefox should now start in these cases, although parts of the interface may not display correctly until a further update completes (Bug 2056926). - Fixed audio playing silently on some music and audio streaming sites after pausing and resuming playback (Bug 2053586). - Fixed the New Tab page background flashing a few seconds after the page loaded when a custom wallpaper was in use (Bug 2056650). - Fixed a crash that could occur when a page loaded a frame using a javascript: address (Bug 2054485). - Fixed a crash that could occur while typing text in an editable area of a page (Bug 2053867). - Fixed a search engine you had already installed yourself being labeled as "New" when Firefox later started offering the same engine (Bug 2053710). - Improved pointer lock, used by games and other immersive web content, so that the mouse pointer is less likely to escape the Firefox window (Bug 1255338, Bug 2040628). - Fixed an issue in the Inspector's Rules view where pseudo-elements could only be expanded once per selected element (Bug 2054525). - Fixed View Page Source failing to load blob: documents (Bug 2054428). - Fixed View Page Source timing out on documents that inherit their origin, such as frames using the srcdoc attribute (Bug 2054487). - Reference link…

Release notes

Manifest: manifests/m/Mozilla/Firefox/153.0.1

Pin this version: winget install --id Mozilla.Firefox --version 153.0 --exact

Version 153.0, first offered to Release channel users on July 21, 2026 New - High Dynamic Range (HDR) video playback is now available on Windows - this feature needs HDR mode enabled for the display in Windows Settings - Display. Laptop displays that only offer "HDR video streaming" are not supported at this time. Some videos recorded on phones in certain orientations are currently not shown as HDR. - Containers let you keep separate parts of your online life (work, shopping, personal, banking) logged into different accounts in the same browser window, but keep your cookies and ad tracking isolated inside each container. - Share any open page with a QR code. Right-click a tab, select Share > Generate QR Code. Great for posters, invitations, banners, and other printed materials. - It is now possible to merge multiple PDFs by dragging a PDF into the PDF sidebar. - It is now possible to add images as new pages within PDFs using the Firefox PDF editor. - Quickly pick and copy a color from any page by typing "pick color", "color picker", or "eyedropper" in the address bar and selecting the "Pick a color" quick action. - Added support for Apple's system-wide full-screen keyboard command (Globe-F). - Firefox now verifies and displays Qualified Website Authentication Certificates (QWACs) in accordance with eIDAS regulations. - Added improved support for videos with overlays so users can more easily access video actions from context menus. - Firefox now highlights the location…

Release notes

Manifest: manifests/m/Mozilla/Firefox/153.0

Pin this version: winget install --id Mozilla.Firefox --version 152.0.6 --exact

Version 152.0.6, first offered to Release channel users on July 14, 2026 New - Smart Window includes several enhancements: - Select text on a page and get quick access to summarize, explain, and more using the built-in assistant. (Bug 2034921) - Added a row of shortcuts to New Tab, making it easier to get back to sites. (Bug 2048338) This feature is part of a progressive roll out. What is a progressive roll out? Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience. Fixed - Fixed an issue that prevented email tracking protection from being disabled in the redesigned Firefox Settings. (Bug 2049331) - Fixed a hang that could occur after using a file picker dialog on macOS 26. (Bug 2053177) - Fixed the homepage not loading for some enterprise configurations that set it using a legacy autoconfig format. (Bug 2047962) - Various security fixes. - Reference link to 152.0.5 release notes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/152.0.6

Pin this version: winget install --id Mozilla.Firefox --version 152.0.5 --exact

Version 152.0.5, first offered to Release channel users on July 7, 2026 Fixed - Fixed the Manage payment methods list in Settings appearing empty when a saved payment card had no expiration date. (Bug 2048383) - Reference link to 152.0.4 release notes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/152.0.5

Pin this version: winget install --id Mozilla.Firefox --version 152.0.4 --exact

Version 152.0.4, first offered to Release channel users on June 30, 2026 New - Smart Window includes several enhancements: - You can now ask it to close your tabs, with a confirmation step when needed and the option to undo afterward. (Bug 2040769) - Browsing history results now appear with images. (Bug 2038069) - When you give feedback on a response, you can now choose from common reasons and preview exactly what will be shared before submitting. (Bug 2033002) This feature is part of a progressive roll out. What is a progressive roll out? Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience. Fixed - Fixed copy, paste, undo, redo, and similar keyboard shortcuts not working inside macOS system dialogs such as the Save and Open panels. (Bug 2040851, Bug 2040844) - Fixed the Manage Cookies and Site Data dialog opening with an empty list when opened from the Settings search results. (Bug 2041077) - Fixed keyboard focus landing in the wrong place after following an in-page link, so pressing Tab continues from the link's position as expected. (Bug 2049307) - Various security fixes. - Reference link to 152.0.3 release notes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/152.0.4

Pin this version: winget install --id Mozilla.Firefox --version 152.0.3 --exact

Version 152.0.3, first offered to Release channel users on June 25, 2026 Fixed - Fixed an issue that could cause extreme memory usage and freezing on startup for users with language packs installed. (Bug 2049845) - Reference link to 152.0.2 release notes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/152.0.3

Pin this version: winget install --id Mozilla.Firefox --version 152.0.2 --exact

Version 152.0.2, first offered to Release channel users on June 23, 2026 Fixed - Fixed some Settings section headings showing placeholder text instead of the translated name in certain languages. (Bug 2047983) - Fixed New Tab content not matching the browser's display language after it was changed. (Bug 2046945) - Fixed a regression that could break playback of some MP4 video files. (Bug 2047467) - Fixed a performance regression that could slow down sites performing many encryption and decryption operations at once, such as Proton Drive. (Bug 2046401) - Reference link to 152.0.1 release notes.

Release notes

Manifest: manifests/m/Mozilla/Firefox/152.0.2