Never compromise. Not even in the face of Armageddon.
Most of the speed is due to them compiling packages with the x86-64-v3 and x86-64-v4 instruction set and LTO.
That means the CPU need to be little newer to take advantage of, too
The following PR actually implements a desktop like UI for firefox android.Hope it will be in atleast beta soon.
https://github.com/mozilla-mobile/firefox-android/pull/5218#issuecomment-1966233109
The slowness with libretube mostly origin from the server/instance you selected ( i am not sure though ). Maybe try a different instance ?
If you are interested learning more, there was a veritasium video about analog chips where he quite well explained the working of and the usecases .
Kerala have a big contribution to this since all the school IT labs + government offices here use ubuntu or its slightly modified versions. Wish if every state did so.