> 1. "Don't use safari" Why?

Like everything else, it's tied to your Apple account. You risk losing your browser history etc. You _can_ export it if it happens, but it's easier to not have the issue in the first place.

> 2. Is there an alternative to "Find My" that I can use with AirTag?

https://github.com/seemoo-lab/openhaystack maybe? I haven't tried it.