Feature request; open all links including those in links in the private window when starting up Vivaldi with the commandline; C:\Vivaldi\Application\vivaldi.exe /incognito. Now when I open a link say from an Email of newsfeed it's opened in a new non private/incognito window. The work around I use is right-click the link and copie-paste the url in my incognito window.
fixed it myself got an idea to solve this issue in the register…. had to do some searching but got it fixed