Zen Browser 1.19.2b delivers a tightened security layer and a jump to Firefox 148.0.2, giving users newer web‑standard support and fewer vulnerabilities. It fixes broken RSS live folders for feeds that were stuck at “no updates,” so readers can keep their daily digests running. Performance improvements now make switching between spaces feel almost instant, especially with many tabs open. After the update, some legacy add‑ons may need a quick reinstall due to the engine change.

Zen Browser 1.19.2b Out Now: New Firefox Engine & Security Fixes

Zen Browser has just dropped its latest build, 1.19.2b, bringing an updated Firefox core, tighter security, and a handful of usability tweaks that make the whole experience feel snappier.

Security Enhancements

The new version closes several vulnerabilities that could have let malicious sites sneak in extra code or read private data. Users who had previously patched their browsers with older security updates will find this build more resilient against modern web threats.

Updated Underlying Engine

Zen Browser now runs on Firefox 148.0.2, a leap forward from the previous engine. This means better compatibility with newer HTML5 APIs and improved handling of WebAssembly modules. For developers or power users who rely on cutting‑edge web standards, the update feels like moving from a 2008 laptop to a current one.

RSS Live Folder Fix

A recurring complaint was that some RSS feeds stopped populating when stored in live folders. The patch specifically restores functionality for those feeds that had been stuck at “no updates.” Users who kept a daily digest of tech blogs will notice the feed titles reappear without extra steps.

Spaces Performance Boost

Switching between Zen Browser’s virtual workspaces used to trigger a noticeable lag, especially when many tabs were open. The new build streamlines memory handling, so toggling spaces feels almost instantaneous. Power users who run several projects side by side will find the switch smoother than ever.

How to Update Zen Browser

To get this patch, launch Zen Browser and click Settings > About Zen Browser; the “Check for Updates” button will automatically download the installer. If a manual update is preferred, the latest MSI can be fetched from the official website’s downloads page.

What About Extensions?

Because the underlying engine has changed, some legacy add‑ons may no longer load correctly. It pays to open the Add‑on Manager after updating and look for any extensions marked as incompatible. A quick re‑install or a newer version from the developer usually restores full functionality.

Release Zen-Browser build - 1.19.2b (2026-03-11)

Zen Stable Release Security Various security fixes New Features Updated to Firefox 148.0.2 Fixes Fixed some RSS live folders not working with certain feeds. (#12685)

Release Release build - 1.19.2b (2026-03-11) · zen-browser/desktop