Currently, trying @Vivaldi ! I had before but since they committed to no AI in their browser I got interested again. I know that people talk about chromium based browser being more performant than Firefox based ones. So I opened the same 7 tabs on both browsers and at least in RAM usage they are equal. Actually I'd have expected @librewolf to draw more, as I didn't restart it so it holds still some cached data (I verified that some stuff is cached, not sure about the size of the cached data though)! The CPU is low since both idle.