Yeah, the browser situation sucks and it's getting worse by the day.
> I remember being upset for months when they killed XUL.
You know what, still a week does not pass without me mourning the death XUL...
I'm currently using Waterfox quite a bit. VimFX is still somewhat maintained[1] and works with Waterfox Current.
It should be added that this browser is owned by an adtech company called System1. But my only alternatives at this point is surfing in a straitjacket (without VimFX) or using Waterfox. Haven't really found any apparent wrongdoings by System1 yet, but I guess it's a matter of time...