FWIW if you use a side-tabs addon like Tab Center (Tab Center Redux on newer Firefox) or Tree Style Tabs it's easier to manage. Chrome also just tinifies tabs

FWIW if you use a side-tabs addon like Tab Center (Tab Center Redux on newer Firefox) or Tree Style Tabs it's easier to manage. Chrome also just tinifies tabs as you add them (eventually making them little slivers that are hard to click on/close and impossible to identify), whereas Firefox stops shrinking them at one size and then lets you scroll through them. This itself makes it easier to have more tabs. So if you're a Chrome user having 100 tabs may feel excessive, but given that the experience is pretty pleasant in Firefox a lot of folks have workflows around this. If something is hard to do you'll never discover workflows that need that functionality :) On top of that, the addons I mentioned make the experience even better. For me I have >100 tabs often because I'm working on many things, and each thing may have 3-5 tabs open (github issues, code, a million documentation tabs), and I'm also reading news articles and such, and often queue up things to read later as more tabs that I get to eventually. Pretty easy to get there.