Comment by v5v3

Made a comment, it then asked me to sign up and couldn't be bothered.

The comment was: make the Firefox containers work in private mode.

In Safari private mode. Each tab has no knowledge of another (e.g. log into Gmail and then open a new tab and go to Gmail and you won't be signed in).

Firefox doesn't have this tab level isolation.

Also offer equivalent of safari's lockdown mode. So images and site features capable of loading malware etc are blocked by default.