How do I sign-in to watch FX+ content? Follow Subscribers can sign-in to watch FX+ content using their Xfinity or Cox Contour username/password. Related articles Can I download episodes from FX+? Can I watch FX+ on my TV? Who can sign up for FX+? How can I watch FX+? How do I upgrade to FX+? Comments 0 comments Article is closed for comments.