Frankly, if something doesn’t work in Firefox, thats like <5% market share. Probably lower for a lot of segments. I am familiar with webdev :) Let’s not pretend most devs are checking caniuse for everything. Some sites leverage bleeding edge stuff that necessarily requires chrome, which is also fine. IRL people don’t optimize for Firefox and that’s usually okay, but sometimes there are quirks. That’s all I’m saying
Big unicode doesn’t want you to know this one simple trick