If I open 5 to 10 tabs with various twitter profiles loaded in them, and I won't notice much because of the icepick that I'll very shortly embed in through my ear.
However, I routinely run with tens of tabs open - usually 40-50 - and love the 'tab groups' extension so I can semantically group them (I have more tabs overall, but they're not all actively loaded). It can get a little slow with 50 active tabs, yes, but what doesn't? Modern webpages suck CPU and RAM dry.
Hmmm, this sounds like an interesting extension. Does it ACTUALLY unload them (and release the memory)? Well, even if it quit executing javascript, I'd be sold.
Ah, I've misled. I mean that I have a lot of tabs in groups, and FF doesn't load them when you start it up, just when you visit them. So while I have a 'map' of perhaps a couple of hundred tabs in those tab groups, only the ones I've visited in that session are loaded.
However, I routinely run with tens of tabs open - usually 40-50 - and love the 'tab groups' extension so I can semantically group them (I have more tabs overall, but they're not all actively loaded). It can get a little slow with 50 active tabs, yes, but what doesn't? Modern webpages suck CPU and RAM dry.