No show after start
Very often I have the problem that Vivaldi does not show any window after start. Even after force quit and restart it is not better. Only solution: Restart macOS completely.
Have you tried the shortcut
cmd nfor new window?
@VillageHero Wow, that's not typical at all. Just curious... why the Force Quit rather than exiting Vivaldi with either
Vivaldi / Quit Vivaldi? Did Vivaldi lock up to the point that you could not exit it in any other way? Force Quitting should only be used as a last resort because it doesn't give an application the opportunity to exit gracefully in a controlled manner. With Vivaldi, this can corrupt your profile and cause a ton of other problems.
If you check "Use Native Window" in the Appearance settings, do you still get into a situation where the Vivaldi window does not open or render on launch?