LibreWolf

Firefox Focus on mobile with javascript disabled by default for news sites

The one that always ships late with my distro (Fedora) is my favorite, I guess, since it is the one I use :)

For Firefox mobile, it was the Fennec engine where you could easily install any extension... It became a pain with the Fenix engine

Android. It has the extensions I need and is plenty fast as well.

The gecko demo that fit on 1 3.5" floppy disk.

Iceraven on Android; it's got extensions I use -- notably SingleFile

that the main Firefox doesn't have any more.

Old firefox XUL? When Add-ons isn't restricted.. Well old times.. When search toolbar Spyware are everywhere.. 😂

Nightly

Firefox containers