That can be possible. I remember seeing the option in a clean profile while using Ubuntu.

There is no container option in new Firefox profile. It appears only after when you’ve installed Multi container extension. Firefox from Arch Linux repo.

I use it to play visual novel type android games.

I use Seal, yt-dlp android front-end, on my phone to download videos from streamming sites.

For torrenting, Deluge on my computer and libtorrent on my android. I mainly use torrent for anime so I download a .torrent file from nyaa and open it with Deluge. Done.

A long time contributor of Tachiyomi plans to continue the work under a new name ‘Mihon’. Reddit post