It appears to work just fine in FF26 under Ubuntu 3.10 without anything extra installed. Have you tried turning it off and on? Try a new profile (firefox -profi

It appears to work just fine in FF26 under Ubuntu 3.10 without anything extra installed. Have you tried turning it off and on? Try a new profile (firefox -profileManager) or Restart with Add-ons Disabled (help menu), or perhaps it was just a fluke. Could not reproduce (relevant XKCD: http://xkcd.com/583/ http://xkcd.com/583/ ).