Does "Clear Private Data" now clear everthing?
Previously you had to use
vivaldi://settings/clearBrowserDatato clear everything instead of the
vivaldi menu item "Clear Private Data".
Is this still the case?
No, still has problems.
Password collection not cleared.
Go to previous menu history still listed if you hold click its icon on address bar. I'm not sure if it suppose like that.
All others seem cleared.
@CantankRus The Vivaldi UI doesn't clear some "Hosted App Data" either. There's stuff that can accumulate in your "Local Storage" folder (in addition to extension data) that can only be cleared through the Chrome UI.
Vivaldi also doesn't have an option to clear "Media licences" but I'm not sure to what extent this even gets used.