Changed JPEG XL image loading now uses multiple processor cores automatically. The About Waterfox window now shows the browser engine version alongside the Waterfox version. Updated translations for Spanish (Spain), Brazilian Portuguese, Simplified Chinese, German, Irish and Ukrainian. Brotli moves to Rust for better memory safety Waterfox now uses a Rust implementation of Brotli compression and d…
New Manage your feeds: The feed manager brings posts from your Live Bookmarks together in one place. You are able to browse all your feeds together, choose a bookmark folder or individual subscription, search articles, filter unread posts, and switch between list and grid views. Open it from Settings → Feeds → Open Feeds, or visit about:feeds. Read without leaving the built-in manager: Based on th…
New Choose which feed features appear. Under Settings → Feeds, you can now hide Live Bookmarks from the Bookmarks menu and turn off previews of directly opened feed URLs. These settings are independent of feed discovery. Turning previews off leaves the original feed document open. Open feed articles in a new tab or window. The open article setting now includes Open the original article in a new ta…
New RSS feeds and Live Bookmarks are back. You can once again preview and follow RSS and Atom feeds. Use the feed icon in the address bar to subscribe to a Live Bookmark folder in your bookmarks toolbar or menu. Thanks to the Thunderbird team for continuing to maintain its feed parser. Disable AI in search results, on by default. Under Settings → Search, Waterfox now hides AI answers from search e…
New Auto-hide vertical tabs. Keep the sidebar hidden until you move your mouse to the edge of the window. Prevent tabs from widening when audio plays. A new option under Settings → Appearance → Tab bar lets you prevent audio indicators from changing tab widths. Fixes Restored country flag emoji on Windows. Fixed a problem that prevented older extensions, including Roomy Bookmarks Toolbar redux and…
Improvements to tree tabs and the vertical sidebar This update aims to make the built-in tree tabs more reliable by improving session restoration, tab dragging and sidebar behaviour. More reliable tab trees Fixed an issue where newly opened tabs would sometimes remain invisible until another tab was selected, including links opened from pinned tabs. The restoration of saved tab trees has been impr…
Interface Customisations 6.7 reduced the 'Look and Feel' pane to seven Photon toggles and moved the rest to about:config. They have returned, and there are far more of them - there are now 121 options across ten new groups in the Appearance pane. The reason this took so long and wasn't in the original 6.7.0 release was that almost all of the customisation options were no longer compatible with the…
Waterfox 6.7 upgrades from Gecko ESR 140 to Gecko ESR 153. This release incorporates a year's worth of upstream engine, performance, and security improvements, and most of the Waterfox layer has been rebuilt to run natively on the new platform rather than being added to it. If you have been following the beta series, a summary can be found below. Everything else below details what has changed sinc…
Waterfox 6.7.0 beta 3 switches Ultra Protection back on, broadens Linux packaging to ARM64 with proper package repositories, and continues restoring legacy extension support. New Re-enabled Ultra Protection by default for new profiles. DNS lookups travel over Oblivious HTTP through the Waterfox relay, meaning no single party can see both who you are and which sites you look up. Existing profiles c…
Waterfox 6.6.17 includes security fixes from the forthcoming MFSA 2026-70, attempts to correct the previous regional search configuration, and includes compatibility fixes also shipping in the 6.7 beta. Security Waterfox 6.6.17 includes the fixes covered by Mozilla Foundation Security Advisory 2026-70. Changed Updated the country based search configuration: Qwant is used in supported regions. Duck…
Waterfox 6.7.0 beta 2 expands testing for legacy extensions and Linux packaging while bring tree tabs reliability fixes. New Added initial support for restartless legacy extensions using install.rdf, bootstrap.js, and compatible chrome.manifest entries. Full support will be restored soon. Enabled publication of prerelease x86_64 DEB and RPM packages through the Waterfox OBS repositories. Changed U…
ImportantWaterfox 6.6.16.1 is a hotfix for the search rollout: Corrects Qwant being selected as the default in unsupported regions. Attempts to force Qwant AI answers/summaries to disabled by default. Fixes unsupported locale-country query values such as es_US, which would result in Qwant refusing to return results. Security Waterfox 6.6.16 includes all security fixes that have landed to date for…
Waterfox 6.7 moves from Gecko ESR 140 to Gecko ESR 153. This brings a year of upstream engine, performance, and security work into one release. Much of the Waterfox layer is also rebuilt to run natively inside the new platform. ImportantThis is a beta - everything below is ready to test, and bug reports are helpful. Tree Tabs Waterfox 6.6 shipped tree-style tabs as a bundled extension, a fork of T…
Security Waterfox 6.6.16 includes all security fixes that have landed to date for the upcoming Firefox ESR 140.13, which Mozilla is due to release on 21 July. Rather than hold these back for two weeks, we're shipping them now alongside the search change below. The corresponding Mozilla Foundation Security Advisory will be published when ESR 140.13 is released. If any further security fixes land up…
Security Waterfox 6.6.15 is a follow-up security release for Mozilla Foundation Security Advisory 2026-58. The majority of fixes related to this advisory were already included in Waterfox 6.6.14. This release fixes up the remaining relevant issues and brings the 6.6 series fully in line with the advisory. Coming Soon A beta release for the next major version of Waterfox, 6.7, based on Gecko 153, w…
Web Compatibility Attempted compatibility improvements for Chase and Discord by adjusting how Waterfox presents itself to the site. These changes are compatibility workarounds rather than fixes for a technical limitation in Waterfox. Some sites appear to rely on user agent checks to decide whether a browser is supported, so Waterfox now makes a better effort to identify itself in a way those check…
Bug Fixes Tracking protection assets: Fixed an issue where tracking protection wasn't blocking things properly because the required assets weren't being bundled with the browser. Web Compatibility IDN unicode display: Internationalised domain names are now handled and displayed by the browser as unicode, instead of always being shown as punycode. This provides better legibility for users who visit…
Security Fixed multiple security vulnerabilities as described in Mozilla Foundation Security Advisory 2026-32. Ad Blocker (preview) The built-in ad blocker introduced in 6.6.11 has received a few improvements in this release. It remains in preview testing - you can follow the feedback issue at Native Ad Blocker - Feedback · Issue #4182. Custom Filter Lists manager A new dialog lets you add and rem…
Security The latest security and bug fixes (at the time of this release) have been pulled in from the upcoming Gecko 140.10 ESR release, which will be generally available in two weeks' time. Changes Waterfox is now testing a new feature: a built-in ad blocker that will be enabled by default in an upcoming release. It blocks ads out of the box using filter lists from EasyList, uBlock Origin, and Ad…
Security Fixed multiple security vulnerabilities as described in Mozilla Foundation Security Advisory 2026-22. Changes Backported the fix for Bug 1969603, resolving a recursive deadlock in RTCRtpScriptTransform. This fix is needed for Discord and should restore voice and video functionality. Added a Discord specific user agent override that reports Waterfox as Firefox 149, which should help keep D…
Security Fixed multiple security vulnerabilities as described in Mozilla Foundation Security Advisory 2026-15. Fixed 3 CVEs in the JPEG-XL image decoder. Bug Fixes Certificate reliability improvements: Fixed an issue that could cause "Unknown Issuer" certificate errors on certain sites, most commonly on Linux. Waterfox now refreshes intermediate certificate data as needed to keep HTTPS sites loadi…
This release adds manual tab unloading (useful for freeing memory without closing tabs) and improves how unloaded tabs are represented, fixes a few import/UI issues, and includes platform specific improvements for macOS and Windows. General When importing data from another browser, empty profiles no longer appear in the selection list. Added an Unload Tab option to the tab context menu to free mem…
This is a small release with a Windows import fix, a Linux HDR playback fix, and an important Flathub verification milestone for our Flatpak users. Windows Firefox import fix Fixed an issue that prevented importing Firefox data on Windows. Even if you have already setup Waterfox, you can still import your data via Settings (about:preferences) → General → Import browser data. ℹ Info Passwords impor…
A (not so) devilish release 👹 📝 Note A few privacy‑sensitive behaviours from upstream Firefox code were not fully disabled in earlier Waterfox builds as we intended. In particular: Region detection could still make a one‑time geo‑IP request to Mozilla’s privacy‑preserving backend to infer your country on first run. Some local ML/AI plumbing was still technically available and, in edge cases, could…