Zen Browser Release Notes

Release notes for version 1.21.3b

Thu, 18 Jun 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed transparency not working after updating to 1.21.2b (#14259)
Fixed frequent crashes affecting users with Intel Raptor Lake processors
Fixed an issue on macOS where choosing a PDF option, such as "Save as PDF", from the system print dialog would send the job to your printer instead of saving a file.
Other minor bug fixes and improvements.

⭐ Features

Updated to Firefox 152.0.1

Release notes for version 1.21.2b

Tue, 16 Jun 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed space routing overriding tabs with an explicit container (#14242)
Fixed background tabs focusing on routed tabs (#14165)
Fixed opening glance on links while selecting text in links (#8391)
Other minor bug fixes and improvements

⭐ Features

Updated to Firefox 152.0
Improved support for more advanced cursor movement commands, including those relating to paragraph boundaries, on macOS.
On Windows and Linux, you can now copy links via the tab context menu by right-clicking a tab and selecting Share > Copy Link, making it easy to copy a link without switching to the tab first.

Release notes for version 1.21.1b

Sat, 13 Jun 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed duplicate bookmarks appearing when re-opening a window in MacOS (#9540)
Fixed freezes when switching spaces on certain occasions (#14110)
Improved performance for switching between tabs
Other minor bug fixes and improvements

Release notes for version 1.21b

Thu, 11 Jun 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed extension-opened tabs not being created with the correct container (#14100)
Fixed a bug with the Boosts editor having the wrong theme colors (#14099)
Improved overflowing space icons being inaccessible and improved the feeling when hovering over them (#13747)
Other minor bug fixes and improvements

⭐ Features

Updated to Firefox 151.0.4
Added 'Space Routing', a new feature that allows you to route links to a specific Space. To get started, click on the three dots in your Space name and click on 'Space Routing Settings'.

Release notes for version 1.20.2b

Wed, 03 Jun 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed auto focus for new windows not working. (#12112)
Fixed desktop shortcuts showing zen as 'Nightly'. (#13745)
Other minor bug fixes and performance improvements.

⭐ Features

Updated to Firefox 151.0.3
Boosts now support a dark mode UI based on your system dark mode setting.

Release notes for version 1.20.1b

Wed, 27 May 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed pressing `u` duplicating tabs. (#13851)
Fixed video controls going under the screen when in fullscreen mode. (#10594)
Fixed boosts not working for certain websites. (#13844)
Fixed an issue on macOS where smart cards and security keys could fail to load certificates automatically
Other minor bug fixes and performance improvements.

⭐ Features

Updated to Firefox 151.0.2
You can now type `New Boost` in the urlbar to quickly create a new boost for the current site!

Release notes for version 1.20b

Thu, 21 May 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

This release includes a major new feature called Boosts! Boosts allow you to customize the look and feel of any website to your liking. To start boosting, click the site's control icon in the urlbar and click the new 'Boost' button.

✓ Fixes

Fixed a bug where the url would be cut off when the urlbar was too small. (#13719)
Fixed 'go back to original url' button on pinned tabs showing up even when the url was not modified. (#12949)
Added better support for cyclic workspace switching
Fixed video controls going under the screen when in fullscreen mode. (#10594)
Fixed closing a split view in one window selecting it on other windows. (#13761)

⭐ Features

Updated to Firefox 151.0 and 151.0.1
Boosts are now in Zen! This allows you to tint colors, customize fonts and styles, zap elements and enable automatic dark mode on any website!
Overflowing web extensions will now appear below the urlbar instead of being added back into the site control panel. This only happens in single-sidebar mode.
Zen now strengthens protection against fingerprinting in Standard Enhanced Tracking Protection, making it harder for websites to track you across sites by limiting the amount of information revealed about your device and browser. This reduces the number of users uniquely identifiable by common fingerprinting techniques by an average of ~14%, and by ~49% on macOS.
You can now merge multiple PDFs directly in Zen PDF. Combine separate PDF files into a single document without ever leaving Zen or relying on third-party tools.

Release notes for version 1.19.13b

Wed, 13 May 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed native popovers not working after using dropdowns (#13623)
Fixed unresponsive tabs when opening external links (#13620)
Fixed tab renaming input fields being too narrow (#13629)
Other minor bug fixes and performance improvements.

⭐ Features

Updated to Firefox 150.0.3

Release notes for version 1.19.12b

Fri, 08 May 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed search engines not being visible in settings (#13522)
Fixed Previous Space in MacOS menu bar not working (#13583)
The loading indicator should now show on-top of the webview for double toolbar mode (#13516)
Fix macos crash when native popovers are closed on some occasions (#13294)
Fixed glance having wrong image preview when zoomed in
Other minor bug fixes and performance improvements.

⭐ Features

Updated to Firefox 150.0.2
Improved space swiping feel and performance
The option for 'Create new space' keyboard shortcut has been added to the keyboard shortcuts settings.
Desktop files on linux should now ship with translations for desktop entries.

Release notes for version 1.19.11b

Wed, 29 Apr 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed topbar dropping down when titlebar is enabled (#7094)
Fixed auto hide not working after installing an extension (#13488)
Fixed dragging folders around not working properly (#13492)
Other minor bug fixes and performance improvements.

⭐ Features

Updated to Firefox 150.0.1
Added a space-only search mode for the urlbar, which can be enabled by typing ` + space in the urlbar.

Release notes for version 1.19.10b

Mon, 27 Apr 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed video controls being off screen in compact mode (#10594)
Fixed startup crashes and not letting any tab to be selected (#13414)
Fixed dragging tabs between windows not hiding sidebar (#8643)
Other minor bug fixes and performance improvements.

⭐ Features

(alt or opt)+clicking again on a merged tab will now split it from the selected tab

Release notes for version 1.19.9b

Thu, 23 Apr 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed halts / unresponsiveness happening every certain amount of time (#10649)
Fixed duplicate bookmarks appearing on startup (#9540)
Fixed an issue on macOS where, when macOS Lockdown mode is enabled, emoji characters are not displayed in web content.
Fixed live folders not working with GitHub's new Pull Request UI
Windows users can now install updates without having to accept the User Account Control (UAC) prompt. It might need a re-install to work for existing users.
Other minor bug fixes and performance improvements.

⭐ Features

Updated to Firefox 150.0
(alt or opt)+clicking a tab will now split it with the selected tab
Added a 'Move to folder...' context menu item for tabs to quickly move them to a different folder
Added a new loading progress animation when a page is loading
Safebrowsing and geo-location APIs should work more reliably now

Release notes for version 1.19.8b

Thu, 09 Apr 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

Please see the 1.19.7b release for more details on the fixes included in this release.

✓ Fixes

Fixed some animations inside Zen not respecting the 'reduce motion' system setting (#13140)
Fixed compact mode not hiding the sidebar or toolbar when a site has permissions disabled (#13121)
Fixed accessibility issues with some toolbars such as 'find on page' in private windows

Release notes for version 1.19.7b

Tue, 07 Apr 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed MacOS setting 'disable page swipe' making switching spaces not work at all (#10687)
Fixed double separator lines in context menus in some places (#13093)
Fixed unable to install addons in compact mode (#11667)
Fixed an issue on Linux where the browser toolbar could become unresponsive to mouse clicks after dragging a tab when using Wayland
Other stability fixes and improvements.

⭐ Features

Updated to Firefox 149.0.2
Added a new 'Duplicate tab' keyboard shortcut available in settings

Release notes for version 1.19.6b

Fri, 03 Apr 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed compact mode toggle being appear checked incorrectly (#12973)
Zen now respects more 'reduce motion' system settings to disable or simplify non-essential animations
Switching spaces will not be blocking anymore, meaning you can switch to another space while the current one is still animating (#8206)
Fixed website notifications not being clickable when using the right sidebar (#12104)
Improved low-FPS performance on certain occasions, such as when playing videos or using glance on low-end devices (#12979)
Fixed restoring a pinned tab also scrolling the website to it's original position (#13024)
Fixed some toolbars having unreadable text colors when using certain themes (#13024)

Release notes for version 1.19.5b

Fri, 27 Mar 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

Quick fixes from the 1.19.4b release, please see their respective entries for more details.

✓ Fixes

Fixed new profiles freezing on startup (#12940)
Fixed an issue with drag and dropping tabs, making folders have empty spaces
Fixed Github Live Folders not fetching Pull Request data correctly (#12942)

Release notes for version 1.19.4b

Thu, 26 Mar 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed background grain not showing properly (#12765)
Fixed not being able to switch spaces with scroll actions (#12816)
Fixed closing blank windows when asking for confirmation (#12922)
Increased robustness of HTTP/3 upload performance for unstable network conditions.
Other minor bug fixes and improvements.

⭐ Features

Updated to Firefox 149.0
Optimized the performance glance and its animations, making it more responsive and smoother than before.
Added a 'Un-split tabs' context menu item when right-clicking on a tab inside a split view to quickly un-split it.
Many PDF files will now load significantly faster thanks to hardware acceleration.
Zen now automatically blocks notifications and permanently revokes permissions for any website flagged as malicious by SafeBrowsing. This prevents unsafe sites from sending background notifications to users, commonly used for ads, spam or phishing.
The WebRender layer compositor is now enabled on Windows, reducing power usage during full-screen video playback and improving WebGL/WebGPU performance.

Release notes for version 1.19.3b

Mon, 16 Mar 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Split views will now hide when toggling fullscreen mode.
Other minor bug fixes and improvements.
Improved accessibility for split view controls.
Fixed opening a new window making all tabs appear as 'New Tab' until they are selected.
Fixed chrome hide toolbar flag not being respected for new windows. (#12736)
Others fixes and quality of life improvements

⭐ Features

Holding ctrl/cmd while hovering 'Reset pinned tab' will now duplicate that tab in the background
Added 'Unload all spaces except current' context menu item to the space switcher

Release notes for version 1.19.2b

Wed, 11 Mar 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed some RSS live folders not working with certain feeds. (#12685)
Improved performance for spaces, specially when switching between them. (#11851)
Other minor bug fixes and improvements.

⭐ Features

Updated to Firefox 148.0.2

Release notes for version 1.19.1b

Wed, 04 Mar 2026 00:00:00 GMT

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️

✓ Fixes

Fixed certain popups on MacOS appearing with no background color, making them invisible.
Fixed Github Pull Request live folders not fetching the pull request data correctly.
Other minor bug fixes and improvements.