breaks Twitch and maybe other websites

Currently I can only give 2 stars, despite the extention being in general perfect except one point. When I just tried to open the textbox on facebook, to make a post, it slowed down my browser to a standstill, untill I was prompted to stop this specific extention, as it slowed town firefox, according to the popup. might be worth checking out on the dev side, as there might be soemthing weird happening with the code in combination with the facebook "create post popup". if this issue was not the case, i'd give it a 5* rating easiely.
Furthernmore this eyxtention causes issues with comment boxes in facebook, not allowing the user to type anything at all somewhat often.