Firefox Support Forum

Today all of the sudden, one of my computers running Firefox won't connect to Youtube at all. It says security issue with HSTS. It also says there there is nothing I can do to resolve it. Surely that can't be true. Youtube runs on every other computer in the office just fine.

Here is a screen capture of the message:

Good afternoon,

If necessary, I am available to add more information about this case (145005), in English or Portuguese.

Best regards,

Ana Patrícia Paquete Visual Designer