Maintenance for the week of November 10:
• [COMPLETE] Xbox: NA and EU megaservers for patch maintenance – November 12, 4:00AM EST (9:00 UTC) - 12:00PM EST (17:00 UTC)
• [COMPLETE] PlayStation®: NA and EU megaservers for patch maintenance – November 12, 4:00AM EST (9:00 UTC) - 12:00PM EST (17:00 UTC)
Check your settings in Firefox to see if one of them is causing an issue and if so, reset it to default. Also clear cache and cookies to see if that helps.