SolarPunker

My only extension is uBlock Origin but it isn't the problem (I uninstalled it to test and nothing changed). Thanks for your suggestion, I'll try to play with distrobox (I'm new to Bazzite and immutable distros).

The only "Firefox" not presenting this start issue for me is Floorp but it's proprietary.

If it is due to an inefficiency of Firefox it seems strange to me that no fork has solved the problem, other browsers like Brave work perfectly.

Anything else works fine, the only other problem I've noticed is that some GTK applications don't respect the KDE Plasma theme (in my case only Quod Libet).

Sorry for what? I'm trying a fresh install of Bazzite so the distro prefers flatpaks.

sudo pacman -S irony

Starting with Ubuntu I've tried a lot of distro, here the ones I used the more: Mageia -> Chakra -> Manjaro -> Void -> Arch

I'm having great time with FreeTube Cordova lately, you have to setup the UI initially, understanding its limit for mobile, but it works very well.

Your presence and attention are the most precious thing on the internet.

Nothing versus newpipe but PeerTube doesn't need to support proprietary platforms, also a dedicated app would probably be better to implement particular peertube's features.

Yes

A dedicated more focused app would be better.