Do you mind listing mainstream sites that have serious glitches on Firefox? It's my main browser, and I can't remember one single mainstream site that glitches on FF.
I just ran into a somewhat important website that didn't work right in Firefox. I tried creating an online bank account with Discover. The register account process only worked with chromium. Once I had an account, though, I could use it through Firefox.
It counts, sure, but frankly there’s too many competitive reasons for a non-search Google property to not work well in Chrome. An example of this being that Gmail doesn’t work particularly well in desktop Safari, nor in Edge. Chrome though, no problems...