# Release notes for version 1.21.16b

By Steven Van · 2026-08-27

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

[**Zen Browser**](<https://creatorstoolbox.com/apps/zen-browser>) announced [**Release notes for version 1.21.16b**](<https://www.zen-browser.app/release-notes/1.21.16b>) on August 27, 2026.

## What changed

If you encounter any issues, please report them on the issues page. Thanks everyone for your feedback! ❤️ ✓ 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. ⭐ Features Update Firefox version to 154.0.1

![Zen Browser](<https://www.google.com/s2/favicons?domain=zen-browser.app&sz=128>)

Zen Browser

Privacy-focused, beautifully designed browser built on Firefox — split views, workspaces, and a minimal UI for focused browsing.

[View Zen Browser →](<https://creatorstoolbox.com/apps/zen-browser>)

Sources

[Original source](<https://www.zen-browser.app/release-notes/1.21.16b>)

[Read Release notes for version 1.21.16b on Creators Toolbox](<https://creatorstoolbox.com/blog/zen-browser-release-notes-for-version-1-21-16b>)

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Canonical source: https://creatorstoolbox.com/blog/zen-browser-release-notes-for-version-1-21-16b