Why you SHOULD be using Firefox

[MarcLister]

It's based on Firefox ESR - so it'll be based around 140 at the moment. It doesn't seem to be written anywhere on the homepage, but if you go into the changelogs you can see that the 6.6.x version is based on ESR 140.

6.6.0 - Major ESR 140 upgrade with vertical tabs, tab groups, and new tab experience - Waterfox Release

Waterfox 6.6.0 upgrades the underlying platform from ESR 128 to 140 and introduces first-party vertical tabs, private tabs, tab grouping, new tab wallpapers, expanded media and hardware acceleration, and privacy-friendly defaults.

www.waterfox.com

Nice one, thanks.