I’m a developer and power user, I switched to Firefox months ago. What is making difficult to switch? I found equivalent for all my plugins so far.
Even on a newer computer Firefox feels jagged and hangs. Memory leaks still happening years later. It is so frustrating to see Firefox using 1.5GB of RAM when only 2 tabs remain.
Quantum helped a lot, but it's still not enough for me and many others.
What popular sites don't work in Firefox?
Really? Do you have examples? I haven’t faced this issue. Some websites breaks somehow if you block 3rd party tracking (by breaking I mean that some pictures or video embedded into the page won’t load), but that’s an opt-in feature so I don’t think that’s what you mean.
It would probably take me a bit to figure out exactly how to work with the FireFox advanced debugging tools, but it's familiar territory.
Installing is one click - as simple as the chrome web store.
If you want the ability to unload tabs, firefox struggles with it. The best addon is https://addons.mozilla.org/en-US/firefox/addon/unload-tabs/ but it admits that it is buggy. Haven't tried it though.