Can a Safari developer download iOS 9 beta?

Safari developers aren't Apple developers. You need to enroll to apple developer program and pay the quote.

But, if you aren't an iOS developer, you should NOT install a beta version on a non-testing terminal.

I've known all betas since iOS 4. I know what I'm talking about. Things like no battery (1-2 hours of battery life), no iTunes app, or Phone app not working, all these things can happen on a beta. And, also, is not a warning for a beta 1. For example, my problem with iTunes app happens with at least 3 beta versions, if I remember correctly, beta 4, 5 and 6 of the same iOS.

No, not yet. You'll need to either join a paid program or wait for the public iOS beta later.

Thank you very much! I didn't know what was happening before, since I am a bit new to the developer thing. When I try to enroll, it tells me that I can't enroll at that time. Is it only for now or is it only my problem? I will appreciate your time.

Thank you!