@moooping @jwz Firefox is the worst mainstream browser. Except for all the other ones that are available.
Afaik, at the moment any fork of Firefox still relies on Firefox to do the core developing and they just polish the edges to suit whatever niche they're catering for.
I suspect the interest in a hard/community fork of Firefox is growing, but probably impossible to predict when (or even if) it will pass critical mass threshold and actually happen in any usefully self sustaining way.