I was in the exact same boat as you. Except I also switched because Bitdefender, the anti-virus I used at the time, was not playing nice with Firefox.

Earlier this year, like a few months ago, I decided to try and switch back. It was seamless. In like half an hour I had every bookmark, most passwords, and even some new extensions that have saved me a lot of work since. I recommend you try it and keep Chrome installed on the side in case you run into some problems, but I think after a few days you’ll realize you don’t need it for much.

(in my case it’s still installed for when I inevitably remember that I forgot to transfer a random password that didn’t automatically migrate)