See what landed recently in Firefox Nightly!

Starting with Firefox Nightly 135, the DevTools toolbox colors have been updated to have higher contrast than the regular theme when in High Contrast Mode. Note that this change will only be activated when all of these conditions are met:

• High Contrast Mode is enabled for the system.
• In about:settings, in the "Colors" popup, "Use system colors" is checked, and "Override the colors specified by the page with your selections above" is set to something else than "Never".
• In DevTools settings, the selected Theme is "Auto".

Starting with Firefox 136, profile management is now available in Nightly builds. Users can now more easily create and switch between different profiles.

Starting with Firefox 137, you can now you can easily add your signatures to PDFs. Draw, type, or upload your signature, then place it exactly where you want. Save your go-to signatures for next time.

Starting with Firefox for Android 131, HLS playlist support was deprecated in Nightly builds. Extended testing showed no adverse impact as newer playback technologies have been widely adopted by websites.

Starting with Firefox Nightly 135, third-party tracking cookies are now protected by Total Cookie Protection instead of being blocked by default.

Starting with Firefox 136, scroll-driven animations is enabled in Nightly builds.

Starting with Firefox 137, the Temporal proposal is enabled by default in Firefox Nightly, please experiment with it and provide feedback. Temporal is a better version of Date, for more details, please see https://tc39.es/proposal-temporal/docs/.