The new SameSite behavior has been the default in Firefox Nightly since Nightly 75 (February 2020). At Mozilla, we’ve been able to explore the implications of this change. Starting with Firefox 79 (June 2020), we rolled it out to 50% of the Firefox Beta user base. We want to monitor the scope of any potential breakage. 

JavaScript frameworks security report 2019 

Firefox Quantum is over twice as fast as Firefox from 6 months ago, built on a completely overhauled core engine with brand new technology stolen from our advanced research group, and graced with a beautiful new look designed to get out of the way and let you do what you do best: surf a ton of pages, open a zillion tabs, all guilt free because Firefox Quantum uses less memory than the competition 

Sad news from the folks behind Firefox — they've laid off a quarter of their entire workforce, which reportedly includes both the DevTools and MDN teams.  

Tree for GitLab

Browser extension that makes navigating a GitLab repository feel like a breeze by providing a familiar tree structure.

Chrome Extension

Firefox Add-on

The Firebug extension isn't being developed or maintained any longer. We invite you to use the Firefox built-in DevTools instead. 

Firefox Developer Edition 44, released last week, includes a brand new memory tool to help you understand how your web applications are using and retaining memory.