I've tried Firefox many times over the years, and only recently has it gotten to a point where it's fast and nice enough on macOS. There are still corners of the app I dislike (it doesn't always feel like a native app, for example), but this may be a reason to finally switch.
I used to have Chrome installed for theses situations, but so many factors made me want to use Chrome less and less to the point that I simply didn't want to use it at all, even for rare occasions. For the curious, here are my reasons:
1. Deprecation of APIs that are essential for uBo
2. Phone-home features
3. Non-standard APIs (remember FIDO U2F, anyone?)
4. Constant bashing and name-calling of other browsers that doesn't implement their favored APIs (names like "the new IE")
5. Websites constantly badgering me to use Chrome
Using Brave on rare occasions is a good compromise for me. It has some weird crypto stuff, but it allows me to use an degoogled version of Chromium. I also don't have to worry about it being a vastly insecure fork like some browser forks out in the wild.
1) Install extensions from the Chrome web store
2) Update them
So, if you want a Google-free Chromium with that...Edge?
Firefox was getting much better for a while right after the Quantum release, but recently it has fallen way behind.