Hello Ok. So I have a pretty specific problem, which only happens on Firefox and not other browsers that I have on my computer. Basically, Youtube videos will not play on any website, other than Youtube. For example, if I go to youtube.com, I can play any video without any issues. However, if someone put a youtube video on another website (for example, twitter or 9gag.tv) then I cant play them. I dont get an error message or anything. Just an empty space where the video box should be (see attachments). Did anyone ever had this issue before? The only addons that I have are adblock plus, but i believe the issue was present even before I installed this, and disabling/removing it does not solve the issue. Pictures: http://imgur.com/a/zpwSP http://imgur.com/a/yUz6R Any advice would be appreciated. Thank you PS. Please check attachments for examples.