Comment 514 for bug 195698

In one of the many comments in all these bugs, someone suggested the one and only correct solution: Create a global lock for *all and any kind of dialog*.

Even if you pop up just a single dialog per proxy, master password, site auth, ...., that still means that I can get a second dialog while I'm typing in the first. I can type text blind but not passwords. So I'll always press RETURN for the wrong dialog.

Therefore, FF must never open a second dialog, no matter what.

A great optimization would be to wait for asking for anything until I open a tab which actually needs the password.