I actually tried out Vivaldi for about a month before I went back to Firefox but I like it as well. I think it's the best chromium based browser out there.
Yeah same. Well actually I'm using Firefox on desktop and Vivaldi on my phone (Android), since I love having desktop style tabs on mobile. The trend of having to press a button to open a tab browser really annoys me and although Firefox sort of addressed that with tab groups now, I think Vivaldi's implementation is nicer.