> Because chome is 1. quite new and 2. auto-updating without neither asking or notifying users (and that is G-R-E-A-T).
You know that, but there's no guarantee whatsoever that someone landing on this page knows that.
It's in FB's best interest to inform people of what works and what doesn't. They certainly don't test every single browser out there, so putting the browsers they test on onto this page keeps users on the happy path.
FB really doesn't test all major browsers? That would be very surprising to me as there are only 5 or 6 major ones.
Safari I don't know, are FB obligated to inform people of every possible choise? Nope, they aren't. Now let's discuss something more interesting than this dull facebook page!