I have installed Vivaldi last snapshot on Windows and Mac. When I open new link - Vivaldi freeze on 10 sec and drain CPU. It's happen on Windows and Mac. I try re-install Vivaldi.
First start - all very fast but after restart Vivaldi freeze again.
On Windows a guess: if you let run Vivaldi Snapshot on the same profile as Stable you will get problems – F.ex. may strange effects if the Stable is installed for All users and the Snapshot for User.