I use Firefox as my main browser. I use the multi-account containers extension in Firefox to seperate my browsing activities. Brave is installed as a backup in case firefox fails me. I use TOR browser for searching for stuff that I don’t want linked to me.
Personally, I always use MusicBrainz Picard to tag any music I download, so it doesn’t matter if what I downloaded has incomplete metadata.
If I don’t end up finding the correct release for metadata on MusicBrainz, then I just add it to the database myself (there’s tools and scripts to make it easier to add digital releases).