> Bring back multi-row tabs.

I can't live without multi-row tabs but it's totally doable in current Firefox. It's now possible with just CSS. It still breaks every so often when they make big UI changes but it's manageable.

It's the reason that Firefox is my main browser.

If that's your main reason have you tried vivaldi?

Vivaldi is great on paper (if you don't care about it being F/OSS), but it's wildly unstable compared to all other major browsers including Firefox. Every time I try to use it as a primary, I end up running into something blocking within a week, reporting it, and switching back to whatever.

Which is a shame, because, stability aside, it really is the best option among Blink-based browsers, at least for the power user. No containers, sadly, but the problem there is Blink itself.

I played that game for a while, it gets old. Also the UX is not nearly as good as TMP when it comes to moving tabs around.

dropping anything goes xul was a large improvement in security. Extensions still have a lot of power.

Why not drop the browser entirely and get maximum security? Firefox without TMP is not worth using for me.

I've been led to believe that xul played a large part in the memory leaks, security issues, and poor performance Firefox was known for.