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
Many of the O.G. Opera devs founded Vivaldi after Opera was sold to Chinese investors. It’s Chromium, but it has a considerable number of excellent power user features
I believe they also have plans to move beyond Chromium, but a new code base isn’t a quick project… (That said, they do eliminate the tracking features and other questionable elements of the code currently.)