Academic success perhaps. The killer and Nuno Loureiro, the MIT professor he killed, were in the same class at Instituto Superior Técnico (Portugal's leading engineering school). Loureiro had a distinguished career at MIT while the killer was homeless.

Yes they do: https://snapcraft.io/docs/keeping-snaps-up-to-date#heading--...

Two. One is firefox and the other is the snap store desktop app. The rest are dependencies and things like that.