New Update Zen Browser Updates

[silversurfer]

Release build - 1.21.10b (2026-07-29)

New Features​

• Updated Firefox to 153.0.1

Fixes​

• Various performance fixes, RTX Super Resolution not working, and HDR video playback not working on Windows (#14292)
• Fixed extra divider when urlbar has no results (#14717)
• Fix boost applying wrong size override (#14461)
• Fixed crashes/hangs when creating new spaces (#14713)
• Fixed non-tab drags allowing to switch Spaces (#14724)
• Fixed essential tab reordering not working at maximum capacity (#14726)
• Fixed compact sidebar activation at right screen edge (#14409)
• Other bug fixes and improvements.

Release Release build - 1.21.10b (2026-07-29) · zen-browser/desktop

Zen Stable Release New Features Updated Firefox to 153.0.1 Fixes Various performance fixes, RTX Super Resolution not working, and HDR video playback not working on Windows (#14292) Fixed extra d...

github.com

 

[silversurfer]

Release build - 1.21.11b (2026-08-06)

New Features​

• Updated Firefox to 153.0.3
• You can now filter draft GitHub pull requests in live folders.
• Compact mode now tracks your mouse even after it leaves the window, the sidebar stays open while your cursor lingers near the window's edge and only tucks away once you move further out. This only changed for Windows and MacOS, Linux is still the same as before.
• You can now move the window by dragging empty space in the top part of a webpage, with native snapping and tiling, just like dragging the titlebar. Links, buttons, and other interactive elements still work as usual.
• You can now have multiple media controls in the sidebar, allowing you to control multiple media sources at once.
• Improved startup performance and feeling

Fixes​

• Fixes issue setting keybinds with shift + digit or symbol (#9918)
• Fix closing split tab in one window changing focus of other windows (#13761)
• Other bug fixes and improvements.

Release Release build - 1.21.11b (2026-08-06) · zen-browser/desktop

Zen Stable Release New Features Updated Firefox to 153.0.3 You can now filter draft GitHub pull requests in live folders. Compact mode now tracks your mouse even after it leaves the window, the si...

github.com

 

[silversurfer]

Release build - 1.21.12b (2026-08-07)

Fixes​

• Fixed selecting text at the top of a page making the window drag instead of selecting text.
• Other bug fixes and improvements.

Release Release build - 1.21.12b (2026-08-07) · zen-browser/desktop

Zen Stable Release Fixes Fixed selecting text at the top of a page making the window drag instead of selecting text. Other bug fixes and improvements.

github.com

 

[silversurfer]

Release build - 1.21.13b (2026-08-09)

Fixes​

• Fixed infinite media players appearing infinitely in the sidebar when a page has multiple media players.
• Other bug fixes and improvements.

Release Release build - 1.21.13b (2026-08-09) · zen-browser/desktop

Zen Stable Release Fixes Fixed infinite media players appearing infinitely in the sidebar when a page has multiple media players. Other bug fixes and improvements.

github.com

 

[lokamoka820]

Release build - 1.21.14b (2026-08-11)

New Features​

• Update Firefox version to 153.0.4
• Added support for FFmpeg 63

Fixes​

• Fixed feature callouts not using native panels (#14912)
• Fixed hang when using the same tab in 2 windows with different containers (#14905)
• Other bug fixes and improvements.

Release Release build - 1.21.14b (2026-08-11) · zen-browser/desktop

Zen Stable Release New Features Update Firefox version to 153.0.4 Added support for FFmpeg 63 Fixes Fixed feature callouts not using native panels (#14912) Fixed hang when using the same tab in ...

github.com

 

[lokamoka820]

Release build - 1.21.15b (2026-08-18)

Security​

• Security Vulnerabilities fixed in Firefox 154

New Features​

• Update Firefox version to 154.0
• Local Zen 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.
• Performing a hard reload on a page (holding Shift while clicking the Refresh button) now also clears and updates its cached favicons.

Fixes​

• Improved battery life on MacOS when using vibrancy effects
• Improved performance of session restore, having spikes of CPU usage every time the session is stored into disk (#14990)
• Fix multiple glance tabs when joining tabs (#14975)
• Improved rendering performance on MacOS and memory leaks when using WebRTC (#9649)
• Fixed an issue on macOS where closing a browser window could leave behind an invisible window that continued to capture mouse clicks over the area where it used to be.
• Fixed an issue on Windows where an auto-hiding taskbar would not appear until the Zen window had been minimized and restored after launch.
• Fixed an issue where the Windows taskbar would appear in front of a full screen Picture-in-Picture window.
• Fixed PDF documents not being scaled correctly in print preview when the Fit to Page Width option is used.
• Other bug fixes and improvements.

Known Issues​

• Following recent changes to Zen's password storage, some users may experience slower performance when Zen accesses saved passwords. Users with a Primary Password enabled may also see unexpected password prompts, such as when starting Zen or opening certain content.

Release Release build - 1.21.15b (2026-08-18) · zen-browser/desktop

Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-74/ New Features Update Firefox version to 154.0 Local Zen profile backups are now available on macOS in ad...

github.com

 

[silversurfer]

Release build - 1.21.16b (2026-08-28)

New Features​

• Update Firefox version to 154.0.1

Fixes​

• Improved on session store performance, lowering CPU usage spikes and disk usage when storing the session (#14990)
• Fixed duplicate separator on tab context menu (#15031)
• Fixed minimizing PiP window failing to collapse into the sidebar (#14710)
• Fixed slower access to saved passwords and unexpected Primary Password prompts caused by recent changes to password storage.
• Fixed an issue where addresses were failing to autofill on some sites.
• Other bug fixes and improvements.

Release Release build - 1.21.16b (2026-08-28) · zen-browser/desktop

Zen Stable Release New Features Update Firefox version to 154.0.1 Fixes Improved on session store performance, lowering CPU usage spikes and disk usage when storing the session (#14990) Fixed du...

github.com

 

[silversurfer]

Release build - 1.22b (2026-09-04)

Security​

• Security Vulnerabilities fixed in Firefox 155

New Features​

• Updated to Freifox 155.0 and 155.0.1
• By using your Mozilla account, you can now sync your Spaces, Folders, Tabs, and much more between devices! This can be enabled in Settings > Sync > Sync your Spaces across devices.
• The chrome UI now has a better look and feel, implementing squircles and other design elements to make it more visually appealing.
• A new on-boarding experience has been added to help new users get started with the browser and its features.
• Creating a new Space is now faster and requires less animation wait time, making the process more efficient.
• Containers can now be reordered in Settings, and the new order is used wherever containers are listed.

Fixes​

• Fixed live folders for GitHub issues not working with the new GitHub UI
• Fixed Zen preventing Linux systems from going to sleep after a long browsing session.
• Fixed arrow-key and Page Up/Down scrolling not working on some pages with embedded content from other sites.
• Fixed live audio streams such as internet radio stopping when playing in the background.
• Other bug fixes and improvements.

Changes​

• Font size has been increased for the sidebar text, making it easier to read and navigate through tabs and spaces.
• Zen now uses firefox-portal-detection.com instead of detectportal.firefox.com to detect captive portals and check network connectivity, so network allowlists referencing the old domain need updating.
• PDFs smaller than the paper size can now be enlarged to fill the sheet when printing, by setting the scale above 100%.

Release Release build - 1.22b (2026-09-04) · zen-browser/desktop

Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-82/ New Features Updated to Freifox 155.0 and 155.0.1 By using your Mozilla account, you can now sync your ...

github.com

 

[silversurfer]

Release build - 1.22.1b (2026-09-11)

New Features​

• You now have the option to sync normal tabs across devices along with your Spaces, Folders, and other data. This can be enabled in Settings > Sync > Sync your Spaces across devices.
• You can now share Spaces, folders and split views to other Zen users and non-Zen users via a shareable link. This can be found in the context menu of a Space, folder or split view.

Fixes​

• Noticeably improved performance and battery usage while scrolling, and playing videos.
• Other bug fixes and improvements.

Release Release build - 1.22.1b (2026-09-11) · zen-browser/desktop

Zen Stable Release New Features You now have the option to sync normal tabs across devices along with your Spaces, Folders, and other data. This can be enabled in Settings > Sync > Sync your Space...

github.com

 

[silversurfer]

Release build - 1.22.2b (2026-09-15)

Security​

• Security Vulnerabilities fixed in Firefox 156

New Features​

• Updated to Firefox 156.0
• Zen on macOS can now be set to open automatically when the computer starts up, from the Startup section of Settings.
• Added the following actions to the command bar: 'Expand current view', 'New space', 'Reopen closed tab', 'Duplicate tab', 'Reset pinned tab'.

Fixes​

• Fixed high-sample-rate FLAC audio in MP4 failing to play on certain video sites.
• 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 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 an issue on Windows where Zen could block an auto-hiding taskbar from showing.
• Fixed the sidebar not hiding if the urlbar is open when compact mode is enabled. (#13196)
• Fixed an issue where cross-space tab routing would freeze the browser under certain conditions. (#14171)
• Fixed cross-device sync losing certain tabs if they are created too quickly (#15380)
• Fixed certain issues related to live folders appearing as active even when they are no tabs showing in them.
• Other bug fixes and improvements.

Changes​

• Zen's built-in PDF viewer now starts up to 45% faster.
• Improved memory and CPU usage when Zen 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.
• Live Folders will now ignore archived issues and pull requests.
• Improved the look and feel of drag-and-drop interactions for tabs. Specially on MacOS, where the drag-and-drop behavior is now done natively.
• Folders will now fully-expand if all tabs within them are visible. Folder animations has also been improved for smoother transitions.

Release Release build - 1.22.2b (2026-09-15) · zen-browser/desktop

Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-90/ New Features Updated to Firefox 156.0 Zen on macOS can now be set to open automatically when the comput...

github.com