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 How can I watch FX+? How do I upgrade to FX+? Can I download episodes from FX+? Where can I watch a FX, FXX or FXM show online or in an app? Comments 0 comments Article is closed for comments.