I took a Pop update today. After reboot Vivaldi (and only Vivaldi) wouldn’t start correctly; there were no icons or menu bar, so it had to be quit from outside.
I saw that this happened to someone else on a previous update. The same intervention worked. This will trash all of your bookmarks and other config. There’s probably a less scorched-earth way to dig out, but since I do use their sync service, this was an easy fix.
- Move/zip up/delete the ~/.config/vivaldi/Default directory
- Accept the onboard new user stuff.
Vivaldi sync is far from perfect. After re-establishing it, you’ll need to reconfigure all extensions you were running, and many of your settings will have been discarded, even if you said to sync them.
It’s likely that the only thing you need to do is clear Vivaldi’s GPU shader cache.