Comment 4 for bug 1058315

Just did a little bit of testing, and this problem does not seem to occur on basic authentication, only on pages with Windows-based authentication dialog boxes. To confirm, I used tested Firefox running Ubuntu Firefox Modifications using the public testing endpoint at https://httpbin.org/basic-auth/user/passwd (with both HTTP and HTTPS). The username is "user" and the password is "passwd" for this particular endpoint. No problems were encountered here, since this is basic authentication instead of Windows authentication.