Opera used to be a fantastic web browser, with a custom high-performance Presto rendering engine and features like tabbed windows that didn't show up in competing browsers until years later. However, the modern Opera browser is a shadow of its former self, reliant on chasing trends and meme advertising to
I loved some of the functionality Vivaldi adds (split tabs, tab groups, etc) but I couldn’t take the instability that came with it. That thing crashed more times in the 6 months I used it than Firefox or Chrome ever have for me total I swear to god.
I use Vivaldi on macOS and Android.
I’ve never had stability issues.