Sometimes, the video or audio content in a web page cannot be properly downloaded and displayed in Firefox. A required plugin may be missing, outdated, blocked.

See Troubleshoot issues with plugins

Thanks for the response, but how do I find out if a plug-in is missing? It must be something that only BT Sport needs because I can play Sky Sports football with Firefox fine.

BT needs an extra add-on (called playsomething-or-other) for security reasons in Silverlight, But I downloaded that some time ago.

It's a bit annoying as I can get it fine with IE (via the BT website) or on the Nexus 7 tablet (via the BT Sport app) which hasn't got a brilliant video-playing reputation as Flash Player isn't supported.

Please Go through the article, and try to install other plugins like QuickTime plugin. Some more plugins and various options are given there, please check which one of them meets your need.

Reply back to us.

Thank You

Well, here's a strange one. A Quicktime download solved it (I thought it was installed already) - BUT the video will only play if, after bringing up the appropriate BT Sport page, I go to 'Tools' and click on 'Add-ons' and bring up the Add-on Manager page. No need to click on anything else, just simply display the page! What?! The plug-in is 'Always Activate'.