ash

No need to give permissions, you can place the files directly into flatpak’s directory. I don’t know the exact path because I use librewolf but it is something like:

~/.var/app/io.gitlab.librewolf-community/.librewolf

Just look for folders with firefox/mozzila in its name.

A blog of course.

There are VPS services that dont give a fuck about DMCAs and pirated content. You should specifically look for one like that if this is your intent. I do not have any specific provider recommendations but you might find something useful in lowendtalk.