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
It’s made by a lot of the original Opera team, including the founder. They have some nifty features that either require an addon in Firefox or are unavailable. Tab tiling is the one that I miss almost daily when I’m using Firefox.
They are an innovative group that often pioneers features that eventually trickle down to other browsers. Although it’s based on chromium, it’s an excellent browser that offers better privacy than Chrome. They have done a great job building a browser that caters to power users but can also be configured to use a simplified UI similar to Chrome.
If they had container tabs like Firefox it would be my favorite browser hands down. They have profiles like Chrome that work much better than Firefox profiles, but each profile is a separate window whereas container tabs can be mixed in a single window.
And Vivaldi for Android is also great. It has an actual tab bar with tabs you can move around, stack on each other etc. (among other things). Totally recommend.