As it happens sometims, Firefox freezed my laptop, but during the update... After hard reboot I got a message along the lines of "something went wrong, please contact system administrator". I rebooted, hit e to add the single option at boot. Tried eopkg up but it couldn't fetch files. Tried ping google.com, didn't work. Tried to rollback, didn't work (no network). Then I checked the NetworkManager status:
systemctl status NetworkManager.service
It was enabled but not running, so I started it with
systemctl start NetworkManager.service
and ping was working, hurray! So I could eopkg up and the system was fixed upon reboot. Quite a rollercoaster. Lesson learned: next times I'll check the forum for the update before running it, with all apps closed.
