Phasing Out the Older Version of Firefox Sidebar in 2026
Over a year ago, we introduced an updated version of the sidebar that offers easy access to multiple tools – bookmarks, history, tabs from other devices, and a selection of … Read more
Closing out 2025 Strong – These Weeks in Firefox: Issue 193
Highlights Special shout-out to volunteer contributor Lorenz A for fixing a huge smattering of bugs in our DevTools code! Lorenz fixed the alignment of numeric values in Netmonitor and fixed … Read more
Getting Better Every Day – These Weeks in Firefox: Issue 192
Highlights Collapsed tab group hover preview is going live in Firefox 145! Nicolas Chevobbe added a feature that collapses unreferenced CSS variables declarations in the Rules view (#1719461) Alexandre Poirot … Read more
Extensions UI Improvements and More – These Weeks in Firefox: Issue 191
Highlights As part of improvements to the extensions panel, an empty state UI has been introduced to help users to understand why their installed extensions may not be listed in … Read more
Smarter Search, Smoother Tools – These Weeks in Firefox: Issue 190
Highlights Google Lens support has been turned on by default in the latest nightly builds. When Google is your default search engine, and you right click an image you’ll see … Read more
Firefox 144 Highlights: Faster Add-ons, Smarter DevTools, and Tab Group Boosts – These Weeks in Firefox, Issue 189
Highlights Leo Liu [:leoliu] added a panel for AntiTracking debugging (#1972771) behind devtools.anti-tracking.enabled Alexandre Poirot [:ochameau] added a “User-defined” badge in the markup view event tooltip to differentiate them from … Read more
Add-ons, Fixes, and DevTools Snacks – These Weeks in Firefox: Issue 188
Highlights The Timer and TODO List widget are now available to be enabled in Firefox Labs on Nightly and Beta: Firefox Desktop about:addons add-on card view has been updated to … Read more
Webcam previews and more! – These Weeks in Firefox: Issue 187
Highlights Nicolas Chevobbe added presentational hints in the Inspector’s rule-view (#1212289) Nate Gross added a new getKeys API method available across all browser.storage APIs (Bug 1910669) Emma Zühlcke (:emz) added … Read more
Custom Profile Avatars Arrive in Nightly – These Weeks in Firefox: Issue 186
Highlights Custom avatar picker (and more icon choices) now available in Nightly Tab Groups: 1971230 – [meta] Preview collapsed tab group on hover coming to Nightly 143 behind pref browser.tabs.groups.hoverPreview.enabled … Read more
Copy Link to Highlight in Nightly – These Weeks in Firefox: Issue 185
Highlights The Text Fragments creation UI was just activated in Firefox Nightly allowing you to share/reference a link anchor to any text snippet in a page https://mastodon.social/@firefoxnightly/114805708639661562 This is held … Read more
Highlights from Volunteer Contributors – These Weeks in Firefox: Issue 184
Highlights Some Picture-in-Picture improvements have landed recently from some volunteer contributors, and should be going out in Firefox 141 on July 22nd: Thanks to new contributor nrcrast for adding a … Read more
Absolute Unit of an Update – These Weeks in Firefox: Issue 183
Highlights Henrik removed all the code related to our experimental CDP (Chrome DevTools Protocol) implementation for browser automation. We also published a fxdx.dev blog post to explain what this means … Read more