Firefox problem

[Mystery Penguin]

and it's not just youtube, various other sites are not working properly either, while internet explorer is just fine

 

[Master Gunns]

Having something like 'NoScript' running in Firefox?

Try clearing your cache/cookies.

 

[Mystery Penguin]

Having something like 'NoScript' running in Firefox?

Try clearing your cache/cookies.

Thanks anyway, I already reinstalled FF, deleted all personal data.
Fixed