[Citation Needed]

What google site or service requires Chrome?

"AI overview" (which I happen to find really useful) was only available on Chrome and Safari for at least a few months.

Sure, it's a lab experiment or whatever, but these are just words, and the effect is that I have to use a different browser to be able to use them, for absolutely no technical reason. (The LLM is running on Google's servers and provides plaintext. I think Firefox could handle that.)

Just visit this on Firefox if you want to see for yourself, including a big "install Chrome" call to action: https://labs.google.com/search/install

Doesn't really support your statement then.

Meet is as shitty on Safari as Google feels they can get away with

I don't know of anything that is completely broken, but some functionality requiers chrome:

On Google Docs, paste as markdown, copy and paste from menus, paste without formatting, etc. only works on chrome. This functionality could be done with standard APIs, but instead google uses a hidden, pre-installed extension to implement it.

Offline mode doesn't work on firefox for either gmail or google docs.

Google doodles don't show up on Firefox Mobile, unless you spoof a chrome user agent.

Youtube has repeatedly had serious performance problems on Firefox.

There are less options for screen sharing on Google Meet.

Are you objecting to single sign on or something? Or some browser extension that is only published for Chrome? What are you talking about?

Some Google sites explicitly say "install Chrome to use this", e.g. this one: https://labs.google.com/search/install