Firefox hangs during recording

I can use Firefox to view all the pages I am interested in. However when I
turn on the manual proxy and try to record these interactions I get a hang
in Firefox after the first redirection to a new url. I tried changing the
port number. Redirect Automatically, Follow Redirects, KeepAlive are all
checked. The step that hangs is doing an SSO.

Any help resolving this would be appreciated.

Thank you.