The worst is when someone is sharing their screen in zoom and then complaining about the lag in Chrome, while you can see the 80+ tabs… I even mentioned it to someone once but did she close them? No. Of course not.
Honestly … I think that’s a myth. I have 200+ FF Nightly tabs open, and I did have up to five tab groups with 100+ tabs each, as well as dozens of Addons, including the notoriously laggy Dark Reader, and I don’t notice any slowdown I wouldn’t call acceptable - just the usual suspects (Teams and google apps) are crap, but that’s just incompatibility with standards on their part. And I don’t have any crazy PC or something, just a pretty old 5 2600 and for the most part 16 GB Ram (which did get pretty tight with Minecraft, Idea and FF running), now 32 GB Detotaded Wam.
Both Firefox (see about:unloads) & Chromium have a feature to unload old tabs when running low on memory. On session restore all tabs start unloaded
