I found someone on the vivaldi forum found a way to get to the chromium privacy settings and such, go to vivaldi://chrome/settings/search#a

Allows you to disable things like prediction service and prefetch... or enable them.. for whatever reason..
Edit: One annoying issue I've found is that when copying text from the UI, it will copy from whatever you last highlighted in Bookmarks... So whatever you do, do NOT use CTRL+X ... that effectively removed ALL my bookmarks..

This largely makes notes useless. I've also noticed that web panels doesn't get "focus" so if you click a link, you can't go back because if you click back it will go back on the main site, not the web panel, even if web panel is the one being used at that moment.