Vivaldi has had a "light" proton VPN for a while.

And this is relevant how? If I wanted Blink trash, I would not be using Firefox

I consider Vivaldi as my backup choice if there is ever something to happen to Firefox. I’ve tried it several times and it’s fine, but I still just prefer Firefox. It just works better. What annoys me is that Vivaldi entirely depends on Google’s extensions store and that sucks. For that I actually like Opera more as they have their own that is not controlled by Google, but the browser has few really dumb issues and design choices, like why is fucking Google Search the only option in Start page? So, yeah almost no matter what I try there’s just always something dumb and I then return to Firefox.

Have you tried Librewolf or Waterfox? I switched to Librewolf about a month ago, after 25 years of using Firefox. Some people say Librewolf breaks websites, but I guess the websites I use are not affected since I haven't run into any problems so far.