Comment by kuschku

For me, I have requested the same since the beginning — just allow me to modify the UI with a markup language.

Or I'll fork, merge all upstream patches down, and work with that.

Currently I have to rely on the AutoHiDPI addon because firefox is otherwise unusable on my system (linux with two screens with very different DPIs).

I also asked for a way to get tab thumbnails done, and to replace the entire bookmark and omnibar system.

But no. Now I'll have to fork Firefox to get a usable browser.