I also made the switch after many years with Chrome. Chrome becomes very sluggish when you have too many tabs open, I guess this is why so many people like OneTab.

Today it's normal to have 10+ tabs open, to read the articles and then leave the best ones open for a later usage. That said I can easily have about 400 tabs open in various Tab-Groups, which is a killer feature.

But honestly, one Firefox addon is so important that I believe that it should be a core feature, it's called UnloadTab [1]. This addon frees up the memory unused tabs allocate, after a defined period of time. It helped a friend with a slow 800MHz Laptop with just a little RAM to finally start clicking links without being afraid that the machine locks up.

People who enjoy the TabGroups feature like I do, should definitely checkout the TabGroups Menu addon.

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[1] https://addons.mozilla.org/en-US/firefox/addon/unloadtab/

[2] https://addons.mozilla.org/en-US/firefox/addon/tabgroups-men...