So… by “users MUST not”, you mean you’d prefer if they didn’t.

I use it daily. It’s my default browser, but it ain’t perfect. Most recently, it was an interactive map for Diablo IV that would never work on Firefox. After an update it started working, but that’s just the most recent example.

As pointed out above, individual use of Firefox doesn’t really do that much. Especially when Firefox already doesn’t work properly for some sites. Plus, lots of people (myself included) need to use Chrome for work. This shit sucks.

I moved to Apple a few years ago, and recently I’ve stopped using Chrome for anything but work, where it’s required (web development, lol). Still married to gmail and google calendar but maybe it’s time I get away from those too…