Hello, # Please check if you have Enhanced Tracking Protection (ETP) enabled. You can do that by clicking the shield [[Image:Fx89ShieldIcon]] icon at the left of the address bar. #* If ETP is enabled, try disabling it. Does the problem persist? # If the problem is not fixed, try [[How to clear the Firefox cache | clearing Firefox cache]]. Does it help? # If it does not help, try also [[Clear cookies and site data in Firefox | clearing cookies and data]] for YouTube (''warning: you will be logged out on this website''). Does it help? # If it also does not help, try [[Diagnose Firefox issues using Troubleshoot Mode | running Firefox in Troubleshoot Mode]]. Does the problem persist? # Finally, if the problem is still not fixed, please check if it persists in other browsers (e.g. Chrome, Edge, Opera or Safari). #* If it doesn't, that's a compatibility issue. Please report it on [https://webcompat.com/issues/new Webcompat], so that our team there may be able to look into it. We'd also appreciate it if you could post a link to your report here.