Re: We see that you're using an ad blocker
"A new spawn of XUL must rise again!"
if *ANYONE* wants to fork Firefox to use the OLD INTERFACE (pre-Australis) I'd LOVE to participate in the development. Sadly I lack time (or funding to PAY myself) to do all of that work myself...
I suppose it'd have to be re-named, and merged frequently with the 'master' branch on Firefox for fixes and whatnot but the MAIN IRRITATION I have with FF is what you described as a crappy-looking interface, and plugin config is only PART of the problem!
Possible new name: "Rebellion" [I've been wanting to use that name for a long time, for this very purpose]