Hi   !

You could try and opt out of the HTML5 Player and use Flash   (set it to 'Allow' on that website).

Hi , yup tried that one still same :( Videos only play correctly on non HTML5 sites

Bummer   !

Would yyou go to this test page, to see if HTML5 is checked  :

https://www.youtube.com/html5

Also :   if you have adBlock Plus 2.9 installed :   it has been reported to cause problems   ........

It's advised to disable/remove adBlock Plus and use uBlock Origin instead :

https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/

But your problem may not be related, though   (just a stab in the dark).

Thanks @happy112 :) Yes HTML5 is suported and used where possible , it says as for adblock , i have aready done that and am using adblock origin Forcing BBC to use flash player it still not playing correctly ?

But the BBC plays 100% in Chrome

Another stab in the dark : Have you allowed cookies for the BBC sites  ?

3-bar menu => click the 'i' in a circle (left side of the address bar),   then click on the little black arrow. Click => More Information => Permissions and scroll down to 'Set Cookies'

One more thing to try :

3-bar menu => Options => Privacy

Under 'History' => 'clear your recent history'

Check 'Cache' only   !

Time range to clear :   'Everything'

Also see :   https://www.bbc.co.uk/iplayer/help/clear_cache

Happy 112 :) yes done that one now No improvement

rongtw said

Happy 112 :) yes done that one now No improvement

Only one thing I can think of now :

If you have any security or anti-virus software installed, would you disable it and see if that makes a difference  ?

I have MS defender and Malwarebytes , neither on auto scan . On demand scan only

You have done just about everything one could think of and quite frankly : I'm running all out of ideas .......

How about this :

https://www.bbc.co.uk/iplayer/help/troubleshooting/web/webchat

Hi , just for clarity this is now fixed :) with Firefox 54