# Firefox changelog

> The independent browser, backed by a non-profit.

- Vendor: Mozilla
- Category: Browsers
- Platforms: Android
- Official site: https://www.firefox.com
- Tracked by: What's New (https://whatsnew.fyi/product/firefox)
- Harvested from: Release index (firefox)
- Entries below: 25 (newest first)

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

## Releases

### 157.0.1

- Date: 2026-10-08
- Version: 157.0.1
- Original notes: https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en&gl=US
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0.1-6bb24df1
- Labels: Platforms: Android

- **added** — Tapping the search field on the homepage quickly returns you to your recent searches
- **changed** — Free VPN is now available in more than 200 regions
- **fixed** — Fixed a crash that could occur when tapping the VPN location row as the VPN became unavailable
- **changed** — History items are now grouped by exact date for easier browsing
- **added** — Items on the Downloads page can now be dismissed by swiping
- **security** — Security fixes were included in this release
- **fixed** — Stability fixes were included in this release

NEW
- Recent searches: Tap the search field on the homepage to quickly return to your recent searches.
- VPN availability: Free VPN is now available in more than 200 regions.
FIXED
- VPN stability: Fixed a crash that could occur when tapping the VPN location row as the VPN became unavailable.
- History items are now grouped by exact date for easier browsing
- You can now swipe to dismiss items on the Downloads page
- Security and stability fixes.

### 158.0b5

- Date: 2026-10-07
- Version: 158.0b5
- Original notes: https://www.mozilla.org/en-US/firefox/158.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/158.0b5
- Labels: Pre-release

- **added** — Smart Window now suggests data to fill form fields based on relevant open tabs and saved autofill data
- **added** — New Tab keeps a library of custom wallpapers under Your images
- **added** — Firefox now supports the JPEG XL image format
- **added** — Tab bar can now be shown at either the top or bottom of the screen on Firefox for Android
- **added** — Support for the navigate option for the Notification constructor and ServiceWorkerRegistration.showNotification()
- **added** — WebAuthn conditional UI will now be shown on input elements with an autocomplete="webauthn" attribute
- **added** — Firefox now supports the cache value for PerformanceResourceTiming.deliveryType
- **added** — Firefox now supports typed arithmetic in CSS calc()
- **added** — WebGL extension EXT_polygon_offset_clamp is now available on compatible devices
- **fixed** — Menus such as the List all tabs menu, the Settings menu, and Unified Search menu are now visually consistent on Windows with a High Contrast theme
- **fixed** — PDF generation now uses SkPDF to make PDFs more accessible and fix various PDF rendering issues
- **fixed** — Firefox no longer rounds scroll positions to whole screen pixels for smoother and more precise scrolling
- **fixed** — Network Monitor no longer misses WebSocket messages if they arrive immediately after a connection is established

###### New
- You can now fill 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.
- New Tab now keeps a library of custom wallpapers under Your images, rather than only the most recent one.
- Firefox now supports the new JPEG XL image format which generally has better compression than WebP, JPEG, PNG and GIF and is designed to supersede them.
- The tab bar can now be shown at either the top or bottom of the screen on Firefox for Android. Check Settings -> Customize to configure.
###### Fixed
- Menus such as the List all tabs menu, the Settings menu, and Unified Search menu are now visually consistent on Windows with a High Contrast theme. The user is now able to customize menu background color and text color when creating a custom theme in Windows Settings by setting Background and Text, respectively.
- PDF generation (for saving as PDF and also printing on Linux and macOS) now uses SkPDF. This allows PDFs to be more accessible, and also fixes a variety of PDF rendering issues.
- Firefox no longer rounds scroll positions to whole screen pixels. Scrolling is now smoother and more precise, especially on high-resolution displays or when a page is zoomed.
###### Developer
- Developer Information
- Fixed an issue where the Network Monitor could miss WebSocket messages if they arrived immediately after a connection was established.
###### Web Platform
- Added support for the navigate option for the Notification constructor and ServiceWorkerRegistration.showNotification(), which specifies a URL to navigate to when the notification is clicked.
- The WebAuthn conditional UI will now be shown on input elements with an autocomplete="webauthn" attribute. Previously, the UI would only be shown on input elements with additional autofill field values, e.g. autocomplete="username webauthn". (Learn more)
- Firefox now supports the cache value for PerformanceResourceTiming.deliveryType, allowing websites to identify resources served from the HTTP cache.
- Firefox now supports typed arithmetic in CSS calc(), allowing units to be multiplied and divided within math functions.
- The WebGL extension EXT_polygon_offset_clamp is now available on compatible devices.

### 157.0.1

- Date: 2026-10-06
- Version: 157.0.1
- Original notes: https://www.mozilla.org/en-US/firefox/157.0.1/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0.1

- **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
- **fixed** — The sidebar getting stuck on the Bookmarks or AI Chatbot panel for some users
- **fixed** — The Restore from Backup option not appearing during onboarding on Windows
- **security** — Security fix

###### 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.

### 157.0.1

- Date: 2026-10-05
- Version: 157.0.1
- Original notes: https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en&gl=US
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0-358e0ebc
- Labels: Platforms: Android

- **added** — Recent searches can be accessed by tapping the search field on the homepage
- **added** — Free VPN is now available in more than 200 regions
- **fixed** — Fixed a crash that could occur when tapping the VPN location row as the VPN became unavailable
- **changed** — History items are now grouped by exact date for easier browsing
- **added** — Swipe to dismiss items on the Downloads page

NEW
- Recent searches: Tap the search field on the homepage to quickly return to your recent searches.
- VPN availability: Free VPN is now available in more than 200 regions.
FIXED
- VPN stability: Fixed a crash that could occur when tapping the VPN location row as the VPN became unavailable.
- History items are now grouped by exact date for easier browsing
- You can now swipe to dismiss items on the Downloads page
- Security and stability fixes.

### 158.0b4

- Date: 2026-10-05
- Version: 158.0b4
- Original notes: https://www.mozilla.org/en-US/firefox/158.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/158.0b4
- Labels: Pre-release

- **added** — Smart Window now suggests data to fill form fields based on relevant open tabs and saved autofill data when clicking into a form field or selecting Fill from sources
- **added** — New Tab now keeps a library of custom wallpapers under Your images
- **added** — Firefox now supports the JPEG XL image format
- **fixed** — Menus such as the List all tabs menu, Settings menu, and Unified Search menu are now visually consistent on Windows with a High Contrast theme, with customizable menu background and text colors
- **fixed** — PDF generation for saving as PDF and printing on Linux and macOS now uses SkPDF for improved accessibility and fixed PDF rendering issues
- **fixed** — Network Monitor no longer misses WebSocket messages that arrive immediately after a connection is established
- **added** — Added support for the navigate option for the Notification constructor and ServiceWorkerRegistration.showNotification() to specify a URL to navigate to when the notification is clicked
- **changed** — WebAuthn conditional UI is now shown on input elements with an autocomplete="webauthn" attribute without requiring additional autofill field values
- **added** — Firefox now supports the cache value for PerformanceResourceTiming.deliveryType to identify resources served from the HTTP cache
- **added** — Firefox now supports typed arithmetic in CSS calc() allowing units to be multiplied and divided within math functions

###### New
- You can now fill 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.
- New Tab now keeps a library of custom wallpapers under Your images, rather than only the most recent one.
- Firefox now supports the new JPEG XL image format which generally has better compression than WebP, JPEG, PNG and GIF and is designed to supersede them.
###### Fixed
- Menus such as the List all tabs menu, the Settings menu, and Unified Search menu are now visually consistent on Windows with a High Contrast theme. The user is now able to customize menu background color and text color when creating a custom theme in Windows Settings by setting Background and Text, respectively.
- PDF generation (for saving as PDF and also printing on Linux and macOS) now uses SkPDF. This allows PDFs to be more accessible, and also fixes a variety of PDF rendering issues.
###### Developer
- Developer Information
- Fixed an issue where the Network Monitor could miss WebSocket messages if they arrived immediately after a connection was established.
###### Web Platform
- Added support for the navigate option for the Notification constructor and ServiceWorkerRegistration.showNotification(), which specifies a URL to navigate to when the notification is clicked.
- The WebAuthn conditional UI will now be shown on input elements with an autocomplete="webauthn" attribute. Previously, the UI would only be shown on input elements with additional autofill field values, e.g. autocomplete="username webauthn". (Learn more)
- Firefox now supports the cache value for PerformanceResourceTiming.deliveryType, allowing websites to identify resources served from the HTTP cache.
- Firefox now supports typed arithmetic in CSS calc(), allowing units to be multiplied and divided within math functions.

### 158.0b3

- Date: 2026-10-02
- Version: 158.0b3
- Original notes: https://www.mozilla.org/en-US/firefox/158.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/158.0b3
- Labels: Pre-release

- **added** — Smart Window now suggests form data based on relevant open tabs and saved autofill data when clicking into a form field or selecting Fill from sources
- **added** — New Tab library of custom wallpapers now stores multiple images under Your images instead of only the most recent one
- **added** — Firefox now supports the JPEG XL image format with better compression than WebP, JPEG, PNG and GIF
- **fixed** — Menus such as List all tabs, Settings, and Unified Search are now visually consistent on Windows with High Contrast theme and allow customization of menu background and text colors
- **fixed** — PDF generation for saving as PDF and printing on Linux and macOS now uses SkPDF for improved accessibility and PDF rendering
- **fixed** — Network Monitor no longer misses WebSocket messages when they arrive immediately after connection establishment
- **added** — Added support for the navigate option in the Notification constructor and ServiceWorkerRegistration.showNotification() to specify a URL to navigate to when the notification is clicked
- **changed** — WebAuthn conditional UI will now be shown on input elements with an autocomplete="webauthn" attribute without requiring additional autofill field values
- **added** — Firefox now supports the cache value for PerformanceResourceTiming.deliveryType to identify resources served from the HTTP cache
- **added** — Firefox now supports typed arithmetic in CSS calc(), allowing units to be multiplied and divided within math functions

###### New
- You can now fill 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.
- New Tab now keeps a library of custom wallpapers under Your images, rather than only the most recent one.
- Firefox now supports the new JPEG XL image format which generally has better compression than WebP, JPEG, PNG and GIF and is designed to supersede them.
###### Fixed
- Menus such as the List all tabs menu, the Settings menu, and Unified Search menu are now visually consistent on Windows with a High Contrast theme. The user is now able to customize menu background color and text color when creating a custom theme in Windows Settings by setting Background and Text, respectively.
- PDF generation (for saving as PDF and also printing on Linux and macOS) now uses SkPDF. This allows PDFs to be more accessible, and also fixes a variety of PDF rendering issues.
###### Developer
- Developer Information
- Fixed an issue where the Network Monitor could miss WebSocket messages if they arrived immediately after a connection was established.
###### Web Platform
- Added support for the navigate option for the Notification constructor and ServiceWorkerRegistration.showNotification(), which specifies a URL to navigate to when the notification is clicked.
- The WebAuthn conditional UI will now be shown on input elements with an autocomplete="webauthn" attribute. Previously, the UI would only be shown on input elements with additional autofill field values, e.g. autocomplete="username webauthn". (Learn more)
- Firefox now supports the cache value for PerformanceResourceTiming.deliveryType, allowing websites to identify resources served from the HTTP cache.
- Firefox now supports typed arithmetic in CSS calc(), allowing units to be multiplied and divided within math functions.

### 158.0b2

- Date: 2026-09-30
- Version: 158.0b2
- Original notes: https://www.mozilla.org/en-US/firefox/158.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/158.0b2
- Labels: Pre-release

- **added** — Smart Window now suggests data to fill form fields based on relevant open tabs and saved autofill data
- **added** — New Tab now keeps a library of custom wallpapers under Your images
- **added** — Firefox now supports the JPEG XL image format
- **fixed** — Menus on Windows with High Contrast theme are now visually consistent and allow customization of menu background and text colors
- **fixed** — PDF generation now uses SkPDF for better accessibility and fixes various PDF rendering issues
- **fixed** — Network Monitor no longer misses WebSocket messages arriving immediately after connection establishment
- **added** — Added support for the navigate option in the Notification constructor and ServiceWorkerRegistration.showNotification()
- **changed** — WebAuthn conditional UI is now shown on input elements with autocomplete="webauthn" attribute without requiring additional autofill field values
- **added** — Firefox now supports the cache value for PerformanceResourceTiming.deliveryType
- **added** — Firefox now supports typed arithmetic in CSS calc() allowing units to be multiplied and divided within math functions

###### New
- You can now fill 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.
- New Tab now keeps a library of custom wallpapers under Your images, rather than only the most recent one.
- Firefox now supports the new JPEG XL image format which generally has better compression than WebP, JPEG, PNG and GIF and is designed to supersede them.
###### Fixed
- Menus such as the List all tabs menu, the Settings menu, and Unified Search menu are now visually consistent on Windows with a High Contrast theme. The user is now able to customize menu background color and text color when creating a custom theme in Windows Settings by setting Background and Text, respectively.
- PDF generation (for saving as PDF and also printing on Linux and macOS) now uses SkPDF. This allows PDFs to be more accessible, and also fixes a variety of PDF rendering issues.
###### Developer
- Developer Information
- Fixed an issue where the Network Monitor could miss WebSocket messages if they arrived immediately after a connection was established.
###### Web Platform
- Added support for the navigate option for the Notification constructor and ServiceWorkerRegistration.showNotification(), which specifies a URL to navigate to when the notification is clicked.
- The WebAuthn conditional UI will now be shown on input elements with an autocomplete="webauthn" attribute. Previously, the UI would only be shown on input elements with additional autofill field values, e.g. autocomplete="username webauthn". (Learn more)
- Firefox now supports the cache value for PerformanceResourceTiming.deliveryType, allowing websites to identify resources served from the HTTP cache.
- Firefox now supports typed arithmetic in CSS calc(), allowing units to be multiplied and divided within math functions.

### 157.0

- Date: 2026-09-29
- Version: 157.0
- Original notes: https://www.mozilla.org/en-US/firefox/157.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0

- **added** — Firefox's biggest visual refresh in years with a modernized look across the browser toolbars, sidebar, menus and individual features, built with an updated design system
- **added** — New built-in themes with light and dark versions to personalize the look of Firefox in one click
- **added** — 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
- **added** — WebRTC video calls can now use hardware AV1 decoding on devices that support it instead of always decoding AV1 video in software
- **added** — Firefox now shows a warning in the site information panel and in Settings when it has been set up to record its encryption keys
- **added** — 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
- **added** — Firefox now supports the at-rule() function for @supports to detect browser support for specific at-rules such as @supports at-rule(@scope)
- **added** — Firefox now supports the chain value for the CSS overscroll-behavior property
- **fixed** — Fixed video from phones and tablets appearing sideways or upside down in WebRTC calls
- **fixed** — Fixed the address bar searching for the typed text instead of opening the selected suggestion when a page was still loading
- **fixed** — Fixed some HDR videos encoded in 8-bit color formats looking dull and gray on Windows instead of displaying in HDR
- **fixed** — Improved audio and video synchronization when repeatedly changing the playback speed of videos
- **fixed** — Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode
- **fixed** — Fixed an issue on Windows where making a video full screen would leave the Windows taskbar showing over the video
- **changed** — Pressing Tab now moves focus straight to the text field of the address bar and search bar instead of stopping on the search engine button first
- **changed** — Amazon is no longer included as a built-in search engine but can still be added as a custom search engine
- **changed** — The updated sidebar is now enabled for everyone and the Show sidebar option has been removed from Settings
- **changed** — Web page alert(), confirm() and prompt() dialogs, the color and date pickers, and form autocomplete drop-downs now match the page's light or dark color scheme

###### 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 encoded in 8-bit color formats looking dull and gray on Windows instead of displaying in HDR.
- Improved audio and video synchronization when repeatedly changing the playback speed of videos, for example on YouTube.
- Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode.
- Fixed an issue on Windows where making a video full screen would leave the Windows taskbar showing over the video.
- Various security fixes.
###### Changed
- Pressing Tab now moves focus straight to the text field of the address bar and search bar instead of stopping on the search engine button first. The button can still be reached with Shift+Tab.
- Amazon is no longer included as a built-in search engine. It can still be added as a custom search engine in the search settings. Learn more.
- The updated sidebar is now enabled for everyone. Anyone still using the previous sidebar will keep a similar layout, with the panel switcher at the top of the sidebar. Additionally, the “Show sidebar” option has been removed from Settings.
While we continue to refine the new design, the previous sidebar version can still be restored by setting sidebar.revamp to false in about:config. This also turns off vertical tabs. The preference will remain available until the end of 2027.
- Web page alert(), confirm() and prompt() dialogs, the color and date pickers, and form autocomplete drop-downs now match the page's light or dark color scheme.
###### Enterprise
- You can find information about policy updates and enterprise-specific bug fixes in the Firefox for Enterprise 157 Release Notes.
###### Developer
- Developer Information
###### Web Platform
- Firefox now supports the at-rule() function for @supports. This allows authors to detect browser support for specific at-rules, such as @supports at-rule(@scope).
- Firefox now supports the chain value for the CSS overscroll-behavior property.
###### Community Contributions
- With the release of Firefox 157, we are pleased to welcome the developers who contributed their first code change to Firefox in this release, 21 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:
- Alexander Gankov: 2033184
- Amadi: 2053549, 2053553, 2065302, 2066478
- Andrew: 2031465
- Caleb Pickard: 2058970
- David Torcivia: 2057758
- dchen705: 2065655
- Ekerin Agboola: 2064541
- Giddeon Card: 2067328
- gustavokrm: 2051536
- Hanzala Sohrab: 2068111
- Ivan Smagin: 2061540
- Jieke Jiang: 206

_[Truncated at 4000 characters — full notes: https://www.mozilla.org/en-US/firefox/157.0/releasenotes/]_

### 153.4.0esr

- Date: 2026-09-29
- Version: 153.4.0esr
- Original notes: https://www.mozilla.org/en-US/firefox/153.4.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/153.4.0esr

- **security** — Various security fixes

###### Fixed
- Various security fixes.
###### Developer
- Developer Information
- Reference link to ESR 153.0 release notes.

### 115.42.0esr

- Date: 2026-09-29
- Version: 115.42.0esr
- Original notes: https://www.mozilla.org/en-US/firefox/115.42.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/115.42.0esr

###### Fixed
- Various security fixes.
###### Developer
- Developer Information

### 140.17.0esr

- Date: 2026-09-29
- Version: 140.17.0esr
- Original notes: https://www.mozilla.org/en-US/firefox/140.17.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/140.17.0esr

###### Fixed
- Various security fixes.
###### Developer
- Developer Information

### 158.0b1

- Date: 2026-09-28
- Version: 158.0b1
- Original notes: https://www.mozilla.org/en-US/firefox/158.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/158.0b1
- Labels: Pre-release

### 157.0

- Date: 2026-09-24
- Version: 157.0
- Original notes: https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en&gl=US
- Permalink: https://whatsnew.fyi/product/firefox/releases/156.0.1-db5677b8
- Labels: Platforms: Android

- **added** — Recent searches can be accessed by tapping the search field on the homepage
- **added** — Free VPN is now available in more than 200 regions
- **fixed** — Fixed a crash that could occur when tapping the VPN location row as the VPN became unavailable
- **changed** — History items are now grouped by exact date for easier browsing
- **added** — Swipe to dismiss items on the Downloads page

NEW
- Recent searches: Tap the search field on the homepage to quickly return to your recent searches.
- VPN availability: Free VPN is now available in more than 200 regions.
FIXED
- VPN stability: Fixed a crash that could occur when tapping the VPN location row as the VPN became unavailable.
- History items are now grouped by exact date for easier browsing
- You can now swipe to dismiss items on the Downloads page
- Security and stability fixes.

### 157.0b5

- Date: 2026-09-23
- Version: 157.0b5
- Original notes: https://www.mozilla.org/en-US/firefox/157.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0b5
- Labels: Pre-release

- **added** — Visual refresh with modernized look across browser chrome, sidebar, and menus built with updated design system
- **added** — New built-in themes with light and dark versions for personalizing Firefox appearance
- **added** — New compact mode that reduces toolbar and tab spacing to give more room for web content
- **added** — Localized suggestions in address bar now available in Austria, Belgium, Czech Republic, Denmark, Finland, Hungary, Ireland, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, and Switzerland
- **changed** — WebRTC video calls may now use hardware AV1 decoding instead of falling back to software
- **fixed** — Fixed address bar searching for typed text instead of opening selected suggestion when a page was still loading
- **fixed** — HDR videos encoded as 8bit color formats now properly display as HDR instead of appearing as dull gray
- **changed** — Improved audio and video synchronization when changing playback rate on HTMLMediaElement
- **fixed** — Fixed Vertical Tabs sidebar not reappearing when cursor moves to edge of screen in full screen mode
- **fixed** — Fixed Windows issue where making a video full screen would leave the Windows taskbar showing over the video
- **changed** — Tab key now moves focus from address bar to search bar without focus landing on search engine button first
- **removed** — Amazon is no longer included as a built-in search engine
- **added** — Firefox now supports the at-rule() function for @supports to detect browser support of specific at-rules
- **added** — Firefox now supports the chain value for the CSS overscroll-behavior property

###### New
- Firefox's biggest visual refresh in years, internally referenced as Project Nova, is now available on Beta, with a modernized look across the browser chrome, sidebar, and menus built with our updated design system. It also includes:
- New built-in themes with light and dark versions, so you can personalize the look of Firefox in a click.
- A new compact mode that reduces toolbar and tab spacing to give you more room for web content, useful on smaller screens and in split-screen layouts.
- Localized suggestions in your address bar are now available in Austria, Belgium, Czech Republic, Denmark, Finland, Hungary, Ireland, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, and Switzerland. You can control the suggestions in your Firefox Suggest settings.
###### Fixed
- On all devices, WebRTC video calls may now use hardware AV1 decoding instead of falling back to software.
- 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.
- HDR videos encoded as 8bit color formats now properly display as HDR in most cases, this fixes several cases of dull gray looking videos that should have been more vibrant.
- Improved audio/video synchronization when changing playback rate on HTMLMediaElement.
- Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode.
- Fixed an issue on Windows where making a video full screen would leave the Windows taskbar showing over the video.
###### Changed
- You can now use the Tab key to move focus from the address bar to the search bar without focus landing on the search bar's search engine button first.
- Amazon is no longer included as a built-in search engine. You can add it as a custom search engine in Firefox’s search settings. Learn more.
###### Developer
- Developer Information
###### Web Platform
- Firefox now supports the at-rule() function for @supports. This allows authors to detect for browser support of specific at-rules, such as @supports at-rule(@scope).
- Firefox now supports the chain value for the CSS overscroll-behavior property.

### 156.0.1

- Date: 2026-09-22
- Version: 156.0.1
- Original notes: https://www.mozilla.org/en-US/firefox/156.0.1/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/156.0.1

- **fixed** — NVDA screen reader now announces address bar buttons when the mouse pointer moves over them
- **fixed** — Elements inside a link now show their CSS :active styles while being clicked
- **fixed** — Firefox no longer becomes unresponsive on some pages that use CSS anchor positioning
- **fixed** — Firefox windows on macOS 27 no longer immediately return to maximized after being restored by double-clicking the title bar
- **fixed** — Firefox no longer leaks system handles on Windows as content processes are started and stopped

###### 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.

### 156.0.1

- Date: 2026-09-21
- Version: 156.0.1
- Original notes: https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en&gl=US
- Permalink: https://whatsnew.fyi/product/firefox/releases/156.0-3a9d022f
- Labels: Platforms: Android

- **added** — Built-in VPN with 50 GB of protected browsing each month to hide IP address and location
- **changed** — Media controls now support skip forward or back and timeline navigation from media notifications
- **changed** — Android sharing on Android 14 and later uses the native Android share menu with Firefox options like Send tab to device and Scan QR code

- Built-in VPN: Get 50 GB of protected browsing each month to help hide your IP address and location. Available in select countries, with more coming soon.
- Better media controls: Skip forward or back and use the timeline to find your spot right from the media notification.
- Android sharing: On Android 14 and later, sharing uses the familiar Android share menu, with additional Firefox options like Send tab to device and Scan QR code. Earlier Android versions keep the existing share screen.

### 157.0b4

- Date: 2026-09-21
- Version: 157.0b4
- Original notes: https://www.mozilla.org/en-US/firefox/157.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0b4
- Labels: Pre-release

- **added** — Tapping the search field on the Firefox for Android homepage now shows your recent searches
- **fixed** — HDR videos encoded as 8bit color formats now properly display as HDR in most cases, fixing several cases of dull gray looking videos that should have been more vibrant
- **changed** — Improved audio/video synchronization when changing playback rate on HTMLMediaElement
- **fixed** — Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode
- **added** — Firefox now supports the at-rule() function for @supports to detect browser support of specific at-rules such as @scope
- **added** — Firefox now supports the chain value for the CSS overscroll-behavior property

###### New
- Tapping the search field on the Firefox for Android homepage now shows your recent searches
###### Fixed
- HDR videos encoded as 8bit color formats now properly display as HDR in most cases, this fixes several cases of dull gray looking videos that should have been more vibrant.
- Improved audio/video synchronization when changing playback rate on HTMLMediaElement.
- Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode.
###### Developer
- Developer Information
###### Web Platform
- Firefox now supports the at-rule() function for @supports. This allows authors to detect for browser support of specific at-rules, such as @supports at-rule(@scope).
- Firefox now supports the chain value for the CSS overscroll-behavior property.

### 157.0b3

- Date: 2026-09-18
- Version: 157.0b3
- Original notes: https://www.mozilla.org/en-US/firefox/157.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0b3
- Labels: Pre-release

- **added** — Tapping the search field on the Firefox for Android homepage now shows your recent searches
- **fixed** — HDR videos encoded as 8bit color formats now properly display as HDR in most cases, fixing dull gray looking videos that should have been more vibrant
- **fixed** — Improved audio/video synchronization when changing playback rate on HTMLMediaElement
- **fixed** — Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode
- **added** — Firefox now supports the at-rule() function for @supports to detect browser support of specific at-rules
- **added** — Firefox now supports the chain value for the CSS overscroll-behavior property

###### New
- Tapping the search field on the Firefox for Android homepage now shows your recent searches
###### Fixed
- HDR videos encoded as 8bit color formats now properly display as HDR in most cases, this fixes several cases of dull gray looking videos that should have been more vibrant.
- Improved audio/video synchronization when changing playback rate on HTMLMediaElement.
- Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode.
###### Developer
- Developer Information
###### Web Platform
- Firefox now supports the at-rule() function for @supports. This allows authors to detect for browser support of specific at-rules, such as @supports at-rule(@scope).
- Firefox now supports the chain value for the CSS overscroll-behavior property.

### 157.0b2

- Date: 2026-09-16
- Version: 157.0b2
- Original notes: https://www.mozilla.org/en-US/firefox/157.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0b2
- Labels: Pre-release

- **added** — Tapping the search field on the Firefox for Android homepage now shows your recent searches
- **fixed** — HDR videos encoded as 8bit color formats now properly display as HDR in most cases
- **fixed** — Improved audio/video synchronization when changing playback rate on HTMLMediaElement
- **fixed** — Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode
- **added** — Firefox now supports the at-rule() function for @supports to detect browser support of specific at-rules
- **added** — Firefox now supports the chain value for the CSS overscroll-behavior property

###### New
- Tapping the search field on the Firefox for Android homepage now shows your recent searches
###### Fixed
- HDR videos encoded as 8bit color formats now properly display as HDR in most cases, this fixes several cases of dull gray looking videos that should have been more vibrant.
- Improved audio/video synchronization when changing playback rate on HTMLMediaElement.
- Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode.
###### Developer
- Developer Information
###### Web Platform
- Firefox now supports the at-rule() function for @supports. This allows authors to detect for browser support of specific at-rules, such as @supports at-rule(@scope).
- Firefox now supports the chain value for the CSS overscroll-behavior property.

### 156.0

- Date: 2026-09-15
- Version: 156.0
- Original notes: https://www.mozilla.org/en-US/firefox/156.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/156.0

- **added** — Firefox on macOS can now be set to open automatically when the computer starts up from the Startup section of Settings
- **added** — Localized Wikipedia and occasional sponsored suggestions in the address bar are now available in France, Germany, and Italy
- **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** — Fixed high-sample-rate FLAC audio in MP4 failing to play on sites such as Bilibili
- **fixed** — 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** — 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** — Fixed the find bar becoming permanently unavailable in a tab after reversing the panes in Split View
- **fixed** — Fixed some sites failing to load when DNS over HTTPS is enabled and the site does not support HTTPS
- **fixed** — Fixed Firefox losing all network connectivity for some users with the built-in VPN enabled
- **fixed** — Fixed an issue on Windows where Firefox could block an auto-hiding taskbar from showing
- **changed** — Firefox's built-in PDF viewer now starts up to 45% faster
- **changed** — Improved memory and CPU usage when Firefox displays large JPEG images scaled down to fit a page
- **changed** — On Windows devices with ARM64 processors, WebRTC video calls may now use hardware H264 decoding instead of falling back to software
- **changed** — text-box-trim now uses the font metrics of a ::first-line pseudo-element when one applies, matching other browsers and the specification

###### 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 to fit a page.
- On Windows devices with ARM64 processors, WebRTC video calls may now use hardware H264 decoding instead of falling back to software.
###### Enterprise
- You can find information about policy updates and enterprise-specific bug fixes in the Firefox for Enterprise 156 Release Notes.
###### Developer
- Developer Information
###### Web Platform
- text-box-trim now uses the font metrics of a ::first-line pseudo-element when one applies, matching other browsers and the specification.
###### Community Contributions
- With the release of Firefox 156, we are pleased to welcome the developers who contributed their first code change to Firefox in this release, 10 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:
- Aaron Ma: 2063818
- Dominik Bay [:eimann]: 2066736
- ExplodingJoysticks: 1728637, 1890400, 1910664, 1928343, 1944206, 2000658, 2003000, 2059911, 2061541
- Gopalarathnam Venkatesan: 2003172, 2042426, 2062096, 2062952, 2062989
- Hugo Osvaldo Barrera: 2063808
- Kana: 2062133
- Kerissa Grubb: 2042422
- Louis-Philippe Manette: 2062972, 2063867
- Seunghyun An: 2063033
- William McDonald: 1034964

### 140.16.0esr

- Date: 2026-09-15
- Version: 140.16.0esr
- Original notes: https://www.mozilla.org/en-US/firefox/140.16.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/140.16.0esr

###### Fixed
- Various security fixes.
###### Developer
- Developer Information

### 115.41.0esr

- Date: 2026-09-15
- Version: 115.41.0esr
- Original notes: https://www.mozilla.org/en-US/firefox/115.41.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/115.41.0esr

###### Fixed
- Various security fixes.
###### Developer
- Developer Information

### 153.3.0esr

- Date: 2026-09-15
- Version: 153.3.0esr
- Original notes: https://www.mozilla.org/en-US/firefox/153.3.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/153.3.0esr

- **fixed** — Fixed various security issues

###### Fixed
- Various security fixes.
###### Developer
- Developer Information
- Reference link to ESR 153.0 release notes.

### 157.0b1

- Date: 2026-09-14
- Version: 157.0b1
- Original notes: https://www.mozilla.org/en-US/firefox/157.0beta/releasenotes/
- Permalink: https://whatsnew.fyi/product/firefox/releases/157.0b1
- Labels: Pre-release

- **added** — Tapping the search field on the Firefox for Android homepage now shows recent searches
- **fixed** — HDR videos encoded as 8bit color formats now properly display as HDR in most cases
- **fixed** — Improved audio/video synchronization when changing playback rate on HTMLMediaElement
- **fixed** — Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode
- **added** — Firefox now supports the at-rule() function for @supports to detect browser support of specific at-rules
- **added** — Firefox now supports the chain value for the CSS overscroll-behavior property

###### New
- Tapping the search field on the Firefox for Android homepage now shows your recent searches
###### Fixed
- HDR videos encoded as 8bit color formats now properly display as HDR in most cases, this fixes several cases of dull gray looking videos that should have been more vibrant.
- Improved audio/video synchronization when changing playback rate on HTMLMediaElement.
- Fixed the Vertical Tabs sidebar not reappearing when the cursor moves to the edge of the screen in full screen mode.
###### Developer
- Developer Information
###### Web Platform
- Firefox now supports the at-rule() function for @supports. This allows authors to detect for browser support of specific at-rules, such as @supports at-rule(@scope).
- Firefox now supports the chain value for the CSS overscroll-behavior property.

### 156.0

- Date: 2026-09-09
- Version: 156.0
- Original notes: https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en&gl=US
- Permalink: https://whatsnew.fyi/product/firefox/releases/155.0.1-ec64d372
- Labels: Platforms: Android

- **added** — Built-in VPN providing 50 GB of protected browsing each month to hide IP address and location
- **changed** — Media controls now support skip forward or back and timeline navigation from media notifications
- **changed** — Android sharing uses the native Android share menu on Android 14 and later with Firefox options like Send tab to device and Scan QR code

- Built-in VPN: Get 50 GB of protected browsing each month to help hide your IP address and location. Available in select countries, with more coming soon.
- Better media controls: Skip forward or back and use the timeline to find your spot right from the media notification.
- Android sharing: On Android 14 and later, sharing uses the familiar Android share menu, with additional Firefox options like Send tab to device and Scan QR code. Earlier Android versions keep the existing share screen.