We’re going to have a serious problem on our hands soon with compatibility. I’m a software dev and I’m already seeing a few issues here and there where Chrome is being treated as the default expected browser and features don’t work on Firefox.

Firefox doesn’t support a fair few Chrome features because of security and privacy reasons, such as WebHID, WebUSB, etc.

Devs, please stop using those features. I know it’s tempting, but they’re basically bribes to encourage you to sell out to Google. Don’t do it.

I’m using Firefox as my only browser. If everything works in Firefox that’s fine for me.

That’s the best advantage of only making websites / web applications for fun (for friend groups, video games, family etc)

Yeah, but that’s my point, not everything works in Firefox now and my prediction is that if we continue on our current course Firefox will either have to compromise their commitment to privacy and security or will become more and more unusable.
I saw this quote a while back “if you only make code that works in chrome you aren’t a web developer, you are a google developer.”