Before downloading the app to your Roku, you have to consider the fact that it is a haven for numerous adverts. If you are okay with the reality, then there’s no one stopping you, you can simply access the Roku channel store and add the channel using the Add channel tab. To activate the app, you can surf to the tv.fxnetworks.com/activate website and paste the activation code in the process. If you want to fix the issues you might face, kindly call the support team to nullify all of them at once