Firefox performance is really bad in google sites like meet, calendar, docs, youtube. I wonder why they are not working on improving the situation. Everything else is already perfect, just iron out these few issues and be the undisputed leader.
I used to cheer for Google and its approach to customers, employees, and the world we live in. That ship has sailed long time ago, now its another greedy global mega corporation with thin veneer of 'we are good guys' (apple is similar but in a different way).
Firefox has less than 2% market share. It is absolutely on Mozilla to seek out the most used sites with performance problems and fix the browser so they are fast.
(This was the state as of a couple years ago, I don't know if there's been further developments since)