Comment 18 for bug 1165649

(In reply to Chris Pearce (:cpearce) from comment #11)
> (In reply to Karl Tomlinson (:karlt) from comment #10)
> > My preferred fix here would be to fix bug 724554 by not exiting fullscreen on
> > focus out. (Even if a message is shown on focus in, that need not require
> > explicit acceptance of fullscreen again and so could be transient, or it
> > could even be shown only if focus is lost for some period of time.)
>
> Not exiting fullscreen upon blur and showing the "$domain is now fullscreen"
> warning for a short period of time when when focus returns to a fullscreen
> window seems like an acceptable compromise to me. I've gotten a lot of
> feedback from users that they want to be able to blur a fullscreen window
> (primarily use case is watching a fullscreen video while doing something
> else in another window/app), so I think this is a good idea.

I posted to mozilla.dev.security to request feedback from the security guys about changing to not exit fullscreen on blur, and show a warning on re-focus of fullscreen windows:

http://groups.google.com/group/mozilla.dev.security/browse_thread/thread/bcb45e15657af746#

I'll see if there's any opposition from the security guys, otherwise I will move ahead with making this change.