Firefox Community Forum

After defaulting Firefox, the previously used add-ons Easy-YouTube downloader, Easy YouTube Video Downloader Pro as well as YouTube Online Video Downloader do not appear on Youtube anymore, like they did before. This never happened before. It was always possible to add and use them again. What to do? Thank you for your help.. I should maybe add that I use a Laptop with Windows Seven. Laugh if you like, I want nothing else, why would I ? I know how to use this thing and it took me long enough, the newer Microsoft Programmes I came across are so terrible, I wonder how any-one can stand them. Thanks again for your time.