Firefox Nightly

Latest Firefox for Desktop development, live from Bugzilla!

Download: https://firefox.com/nightly

Last Notes

2026-06-02 09:21:18 UTC

Quickly pick and copy a color from any page by typing "pick color", "color picker", or "eyedropper" in the address bar and selecting the "Pick a color" quick action.
https://files.mastodon.social/media_attachments/files/116/679/772/810/796/974/original/7ae298087f42fce0.mp4

2026-05-22 12:37:38 UTC

The new JPEG XL image format support was activated today in Firefox Nightly
https://bugzilla.mozilla.org/2040074

2026-05-21 09:53:40 UTC

You can now generate a QR code for a page from the tab context menu (Share -> Generate QR code). https://bugzilla.mozilla.org/1996422
https://files.mastodon.social/media_attachments/files/116/611/945/639/352/584/original/75f9f26628e5d9e9.png

2026-04-27 14:33:35 UTC

[Nightly Blog] VPN, Split View, and Other Goodies – These Weeks in Firefox: Issue 200! https://blog.nightly.mozilla.org/2026/04/27/vpn-split-view-and-other-goodies-these-weeks-in-firefox-issue-200/

2026-03-23 15:39:43 UTC

[Gecko] Competition, Innovation, and the Future of the Web - Why Independent Browser Engines Matter
https://blog.mozilla.org/netpolicy/2026/03/23/competition-innovation-and-the-future-of-the-web/
🦎️

2026-02-03 09:44:23 UTC

AI Controls are available in Firefox Nightly preferences!
Documentation: https://support.mozilla.org/kb/firefox-ai-controls
If you find a bug, please report it on Bugzilla via this link: https://mzl.la/AIControlsFileBug
Thanks!
https://files.mastodon.social/media_attachments/files/116/006/048/872/991/031/original/d29b19072185c2f2.png

2026-01-23 13:40:31 UTC

Firefox & Linux in 2025
https://mastransky.wordpress.com/2026/01/23/firefox-linux-in-2025/

2026-01-19 16:53:24 UTC

[Nightly Blog] Introducing Mozilla’s Firefox Nightly .rpm package for RPM based linux distributions! https://blog.nightly.mozilla.org/2026/01/19/introducing-mozillas-firefox-nightly-rpm-package-for-rpm-based-linux-distributions/

2025-12-25 20:16:24 UTC

[Nightly Blog] Closing out 2025 Strong – These Weeks in Firefox: Issue 193 https://blog.nightly.mozilla.org/2025/12/19/closing-out-2025-strong-these-weeks-in-firefox-issue-193/

2025-07-25 12:02:49 UTC

Happy sysadmin day!
https://xkcd.com/705/

2025-07-06 10:01:31 UTC

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://bugzilla.mozilla.org/1970641
https://files.mastodon.social/media_attachments/files/114/805/704/389/047/482/original/b9596fc9cd516342.mp4

2025-04-09 12:20:01 UTC

Hardening the Firefox Frontend with Content Security Policies
https://attackanddefense.dev/2025/04/09/hardening-the-firefox-frontend-with-content-security-policies.html

2025-03-12 08:52:28 UTC

[Nightly Blog] Turn Tabs To Their Side – These Weeks in Firefox: Issue 177 https://blog.nightly.mozilla.org/2025/03/11/turn-tabs-to-their-side-these-weeks-in-firefox-issue-177/

2025-02-20 19:35:27 UTC

You can now switch to vertical tabs from your tabs context menu
https://files.mastodon.social/media_attachments/files/114/037/890/053/031/053/original/5d638de5ba3f8163.mp4

2025-01-27 07:54:42 UTC

[Nightly Blog] New Year New Tab – These Weeks in Firefox: Issue 175 https://blog.nightly.mozilla.org/2025/01/24/new-year-new-tab-these-weeks-in-firefox-issue-175/

2024-12-23 13:46:00 UTC

Tab groups are now enabled by default in Firefox Nightly 135
https://bugzilla.mozilla.org/1938187
https://files.mastodon.social/media_attachments/files/113/702/433/982/688/466/original/55ebc338dbdc84fb.png
https://files.mastodon.social/media_attachments/files/113/702/438/062/216/552/original/41c08757eaeb1a53.png