So a friend told me about how you could hide twitch player extensions using BTTV,
You know the ones they sit on the right hand side in a little panel and mostly don't do much, but some are really annoying and hover in the side of your player and flash telling you to interact, and I don't know about you but I find those incredibly annoying and wanted to disable them using Frankerfacez (ffz).
Turns out it's actually rather simple to do, in the FrankerFaceZ settings interface it's under
Player > General > Extensions And gives you the option to Never show extensions, Always Show them, or when you hover the mouse over the player to see the volume control and pause button.
So there you have it, that's how to disable or hide Twitch Player Extensions.