# Zen Browser 1.22b — Release build - 1.22b (2026-09-04)

- Product: Zen Browser (https://whatsnew.fyi/product/zen-browser)
- Vendor: Zen Browser
- Date: 2026-09-05
- Version: 1.22b
- Original notes: https://github.com/zen-browser/desktop/releases/tag/1.22b
- Permalink: https://whatsnew.fyi/product/zen-browser/releases/1.22b

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'.

---

- **security** — Security vulnerability addressed per Mozilla security advisory MFSA2026-82
- **changed** — Updated to Firefox 155.0 and 155.0.1
- **added** — Sync Spaces, Folders, Tabs, and other data between devices using Mozilla account via Settings > Sync > Sync your Spaces across devices
- **changed** — Chrome UI redesigned with squircles and other visual design elements for improved appearance
- **added** — New onboarding experience added to help new users get started with the browser and its features
- **changed** — Creating a new Space is now faster with reduced animation wait time
- **added** — Containers can now be reordered in Settings with the new order applied wherever containers are listed
- **fixed** — Fixed live folders for GitHub issues not working with the new GitHub UI
- **fixed** — Fixed Zen preventing Linux systems from going to sleep after a long browsing session
- **fixed** — Fixed arrow-key and Page Up/Down scrolling not working on some pages with embedded content from other sites
- **fixed** — Fixed live audio streams such as internet radio stopping when playing in the background
- **changed** — Font size increased for sidebar text to improve readability and navigation
- **changed** — Captive portal detection now uses firefox-portal-detection.com instead of detectportal.firefox.com, requiring network allowlist updates
- **changed** — PDFs smaller than paper size can now be enlarged to fill the sheet when printing by setting the scale above 100%

#### 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 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%.