Ah, the problem is that FF22 is doing something funny with proxy settings. Fixed by changing to "No proxy" in Edit->Preferences->Advanced->Network->Settings.
See http://forums.mozillazine.org/viewtopic.php?f=38&t=2721971&sid=87bbee6b14de63a410b0ec311525eaf9
Ah, the problem is that FF22 is doing something funny with proxy settings. Fixed by changing to "No proxy" in Edit->Preferenc es->Advanced- >Network- >Settings.
See http:// forums. mozillazine. org/viewtopic. php?f=38& t=2721971& sid=87bbee6b14d e63a410b0ec3115 25eaf9