Download Zen Browser 1.23b

Zen Stable Release
Introducing Library! A better place to organize and access your history, media, downloads, spaces and more.

Security
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-97/

New Features
- Introducing Library! A better place to organize and access your history, media, downloads, spaces and more.
- You can now resize the sidebar even when its hidden. If the sidebar is resized too small, it will automatically hide itself.
- Updated to Firefox 157.0
- WebRTC video calls can now use hardware AV1 decoding on devices that support it, instead of always decoding AV1 video in software.

Fixes
- Significant performance improvements on startups/new windows when there are lots of tabs open.
- Certain icon animations like the boost indicator or musical notes on the sidebar are now more performant. (#15299)
- Fixed status panel and glance controls not using the correct theme colors. (#15280)
- 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 an issue on Windows where making a video full screen would leave the Windows taskbar showing over the video.

Changes
- When a link gets routed to a specific space, it will prioritize the window that has that space open.
- Some elements like the sidebar and the command bar now appear with blur effects.
- On MacOS, buttons at the bottom of the sidebar now appear larger.
- Swiping to the right on the last space will now try to create a new space.
- When the sidebar is at the right, the buttons at the bottom are now reversed.