If I may chime in after a few years on this thread now that there's a focus on this feature: some have brought up Arc (Josh Miller's "The Browser Company") - and I think that's the best angle and feature-set to emulate.Firefox has enjoyed a history a...
The lack of tab management is curious, too, especially when Firefox was a leader in this domain. Tab management is the focus of inventive upstarts. New ways to organize tabs and think of or explore better ways of engaging with the web medium is how t...
I stopped using Firefox as my primary browser due to the lack of native tab group implementation, as it's so crucial to my workflow. I'll gladly return when it's implemented.