[Nightly Blog] Introducing Mozilla’s Firefox Nightly .rpm package for RPM based linux distributions! blog.nightly.mozilla.org/2026/01/19/i...

[Nightly Blog] Phasing Out the Older Version of Firefox Sidebar in 2026 blog.nightly.mozilla.org/2026/01/13/p...

[Nightly Blog] Closing out 2025 Strong – These Weeks in Firefox: Issue 193 blog.nightly.mozilla.org/2025/12/19/c...

[Nightly Blog] Getting Better Every Day – These Weeks in Firefox: Issue 192 blog.nightly.mozilla.org/2025/11/24/g...

The @firefoxdevtools.bsky.social JSON viewer got better in @firefoxnightly.bsky.social : the console offers access to the original json data via `$json`. This allows to easily manipulate the underlying data to get what you want

[Nightly Blog] Extensions UI Improvements and More – These Weeks in Firefox: Issue 191 blog.nightly.mozilla.org/2025/10/27/e...

[Nightly Blog] Smarter Search, Smoother Tools – These Weeks in Firefox: Issue 190 blog.nightly.mozilla.org/2025/10/06/s...

[Nightly Blog] Firefox 144 Highlights: Faster Add-ons, Smarter DevTools, and Tab Group Boosts – These Weeks in Firefox, Issue 189 blog.nightly.mozilla.org/2025/09/22/f...

[Nightly Blog] Add-ons, Fixes, and DevTools Snacks – These Weeks in Firefox: Issue 188 blog.nightly.mozilla.org/2025/09/19/a...

[Nightly Blog] Webcam previews and more! – These Weeks in Firefox: Issue 187 blog.nightly.mozilla.org/2025/09/12/w...

Mozilla - Ask a Fox event community.mozilla.org/campaigns/as...

Firefox Security & Privacy newsletter 2025 Q2 | Attack & Defense attackanddefense.dev/2025/07/17/f...

Fast, private and secure (pick three): Introducing CRLite in Firefox blog.mozilla.org/en/firefox/c...

[Nightly Blog] Custom Profile Avatars Arrive in Nightly – These Weeks in Firefox: Issue 186 blog.nightly.mozilla.org/2025/08/04/c...

[Nightly Blog] Copy Link to Highlight in Nightly – These Weeks in Firefox: Issue 185 blog.nightly.mozilla.org/2025/07/28/c...

Happy sysadmin day! xkcd.com/705/

Just spotted: Firefox Nightly already supports view-transition-class from the Level 2 spec.

Shipping WebGPU on Windows in Firefox 141 – Mozilla Gfx Team Blog mozillagfx.wordpress.com/2025/07/15/s...

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 bugzilla.mozilla.org/1970641

[Nightly Blog] Highlights from Volunteer Contributors – These Weeks in Firefox: Issue 184 blog.nightly.mozilla.org/2025/07/01/h...

A foxfooding campaign was just launched by Paul, one of our core community members to help us find bugs and rough edges to the new Drag to Pin feature. Everybody is welcome to join us do some testing and report bugs! discourse.mozilla.org/t/foxfooding... bsky.app/profile/fire...

[Nightly Blog] Absolute Unit of an Update – These Weeks in Firefox: Issue 183 blog.nightly.mozilla.org/2025/06/18/a...

You can now drag a tab to your pinned tabs tray to pin it, or drag it out to unpin it. bugzilla.mozilla.org/1944907

State of CSS 2025 is now open: stateofcss.com Browser vendors use the results of 'State of' surveys to help prioritize the features to work on. If you care about CSS, please take some time to answer it, and help shape the future of the language

[WebRTC] One-time permissions are here to stay! blog.mozilla.org/webrtc/one-t...

[Nightly Blog] Smarter Searches – These Weeks in Firefox: Issue 182 blog.nightly.mozilla.org/2025/06/06/s...

New Extension Data Consent Experience now available in Firefox Nightly blog.mozilla.org/addons/2025/...

🧪 Experiment with Temporal in @FirefoxNightly! The New API has, 🗺️ Time Zone Support → Easy UTC conversions! 🧮 Precise Calculations → Leap years, daylight saving ✅ Built-in Parsing & Formatting → No need for third-party libraries Start exploring 👇 developer.mozilla.org/en-US/docs/...

[Nightly Blog] Keep on Rolling with Profile Improvements – These Weeks in Firefox: Issue 180 blog.nightly.mozilla.org/2025/05/05/k...

WebExtensions Support for Tab Groups blog.mozilla.org/addons/2025/...

You asked, we built it: Firefox tab groups are here blog.mozilla.org/en/firefox/t...

[Nightly Blog] A Tab Groups Scoop – These Weeks in Firefox: Issue 179 blog.nightly.mozilla.org/2025/04/23/a...

Hardening the Firefox Frontend with Content Security Policies attackanddefense.dev/2025/04/09/h...

✅ Support ::details-content pseudo-element and improved styling of <details> element bugzilla.mozilla.org/show_bug.cgi...

✅Implement auto-expanding <details> bugzilla.mozilla.org/show_bug.cgi...

[Nightly Blog] Putting up Wallpaper – These Weeks in Firefox: Issue 178 blog.nightly.mozilla.org/2025/04/07/p...

SpiderMonkey Newsletter (Firefox 135-137) spidermonkey.dev/blog/2025/03...

[Nightly Blog] Turn Tabs To Their Side – These Weeks in Firefox: Issue 177 blog.nightly.mozilla.org/2025/03/11/t...

Tab groups in Firefox Nightly can now be: - Dragged and dropped - Saved and closed with a middle-click bugzilla.mozilla.org/1908439 bugzilla.mozilla.org/1951939

New Contrast Control Settings blog.monotonous.org/2025/03/06/N... bugzilla.mozilla.org/1898096

Forget Chrome: Why Firefox's new vertical tabs are such a productivity game-changer www.zdnet.com/article/forg...

[Nightly Blog] High Profile Improvements – These Weeks in Firefox: Issue 176 blog.nightly.mozilla.org/2025/03/05/h...

The Network panel now allows overriding network request responses with local files.

Cypress 14.1.0 now defaults to WebDriver BiDi for Firefox 135+. A major step in modernizing browser automation! fxdx.dev/webdriver-bi... #WebDriverBiDi #Firefox

Mozilla’s approach to Manifest V3: What’s different and why it matters for extension users blog.mozilla.org/en/products/...

You can now switch to vertical tabs from your tabs context menu

SpiderMonkey: Making Teleporting Smarter spidermonkey.dev/blog/2025/02...

The Temporal JavaScript API is now activated in Firefox Nightly bugzilla.mozilla.org/1946823

We now* display fonts metadata (version, designer, vendor, license, …) in @firefoxdevtools.bsky.social Inspector Fonts panel * latest @firefoxnightly.bsky.social, 137.0a1 (2025-02-13)