Just joined the beta and am excited to dig in!
One thing I looked for but didn’t see in the documentation was support for opening and managing windows using Safari profiles. (I saw support for private browsing windows.) Are profiles supported or planned?
Welcome, @blackketter! And thanks for checking out the beta. Keep the reports and input coming, please 
Are profiles supported or planned?
I’ve yet to look into them. I’ll put it on my list!
Fantastic, thanks! I’m a Safari user, but I believe that Chrome and Firefox also have support for their own profiles.
They do! But Firefox ain’t supported, and likely never will be. 
(I like Firefox, but there’s no API that BA could use. Mozilla removed that in 2010, I believe.)