duplicate of [/questions/1188950] thread. I have a problem with down loading "video download helper add on. on firefox. After I download it and want to download and copy a youtube video I am blocked from doing so and a notice pops up "Companion application required⊗ This operation requires an external application to be completed.". So when I click on to download the companion I also download a malware on to my computer that takes over my browser search. To remove this malware I have to go and delete Firefox from my computer. Then again I go in and re-download firefox on to my computer. The reason that I downloaded firefox on to my computer was for the "video download helper" so that I can copy youtube videos on to my computer and to download it onto a thumb drive. Since a few weeks ago I have been unable to download and copy the youtube videos with this crap popping up and blocking me from downloading the videos that I wanted to download. Please be advised that I do not go to any outside sites to download this crap : "Companion application required⊗ This operation requires an external application to be completed." and click on the button on the pop up notice I download malware onto my computer. Why is Mozilla forcing me to download malware with you new and improved Firefox browser? What is going on?