Can I disable WebRTC and WebGL in Firefox for Fire TV Cube? In Firefox on a PC or Mac, I can disable WebRTC by installing a browser extension, or I can disable both by typing in "about:config" in the address bar and then changing the settings for each after finding them in the list of configuration settings; "media.peerconnection.enabled" (for WebRTC) - change the value from true to false; "wegl.disabled" (for WebGL) - change the value from false to true. However, the settings for Firefox on Fire TV Cube are very limited. I typed about:config in the address bar in Firefox on Fire TV and got a completely white screen, and I don't see a way to download and install extensions.