Extensions not working properly in private windows
When in private browsing, extensions like Ublock Origin doesn't work properly for me, when you try to disable it for the page, it disables on non-private window you have on background, same happens when you try to pick an element to block.
Is my install just borked or is this a "feature" of the browser?
Have you checked the "use in incognito" for ublock in extensions page?
You should do that for any extensions you use in incognito.
That is a bug in my internal 1.11, too.
Found these bugs and updated bugtracker for latest Vivaldi:
VB-28902 "Ublock Origin reloads wrong window on Private Mode"
VB-28010 "uBlock state behavior wrong (partially inherited, partially shared) between main and private window"