I am in the same boat as you are. After the Firefox Quantum release, I decided to switch from Vivaldi and try Firefox out for a little bit. While I did like it,

I am in the same boat as you are. After the Firefox Quantum release, I decided to switch from Vivaldi and try Firefox out for a little bit. While I did like it, and it did seem to have a slightly faster performance, there are just many QoL feature s that Vivaldi offers that Firefox doesn't (or at least isn't immediately apparent). Simple things such as rebinding keys or reorganizing the top sites were such a headache that I very quickly switched back.