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
Isn’t Vivaldi also shady?
Maybe a tiny bit unstable and proprietary, but I don’t think they have had any controversies or shady action.