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
the last time when I used Opera browser was on my Sony Ericsson W580i and C702i
I remember Opera Mini being the only browser that worked properly on my old Sony Ericsson Xperia X8, all other ones just worked very slowly to the point of being entirely unusable (even Opera Mobile which was a different browser than Opera Mini).
I had Opera on my Nokia 2600. I think it was called a WAP browser back then. Tiny mouse cursor on a 150x170px screen, good times.