nemozone

Firefox is after setting the privacy settings correct a good and user-friendly software, but there are better alternatives. For example LibreWolf.

The easiest way IMHO is the flathub installation. First you have to enable the flathub and its repos

https://flatpak.org/setup/Ubuntu/

flatpak install flathub io.gitlab.librewolf-community

flatpak run io.gitlab.librewolf-community