> The Firefox Multi-Account Containers feature, in my opinion, is what puts this browser at the top.

For a long time this was the reason I didn't move to Brave, but eventually I realized I don't need it so much because Brave already sandboxes cookies for each site so some social media or ad network won't be able to track me across different sites.

The remaining use for multi-account containers now is staying logged in with different accounts to the same site, which for my usecase I can do with Brave profiles.

Now Brave is my major browser and once in a while I'll bring up Librefox. Firefox lost me when they went all in with their strategy to feed user data into AI presumably for ad purposes.