WHAT IS THE PURPOSE OF THIS ADDON?!!!!!!!!!!!!!!!!!!!!!!!!!!!

I DOWNLOADED FDM BUT I COULD USE FDM EXACTLY THE SAME WITHOUT THIS ADDON THAN WHEN I HAVE THIS ADDON!!!!
I COPY THE YOUTUBE LINK AND PASTE IT IN FDM AND THAT IS IT!!!

AND THIS ICON BUTTON, WHAT ON EARTH IS IT FOR?!!!!

Honestly, FDM works but what on earth is this addon for?????!!!!!!!!!!!!!!

Even the pictures you provide here do not explain the slightest how this addon should be used!!!!!!!!!!!!!!!!!

YOU MUST DO BETTER HONESTLY WITH THIS ADDON AND ITS PURPOSE ESPECIALLY!!!

I removed this addon and I still can use FDM exactly the same than when I had this add installed on Firefox!!!!! That is how bad this addon is for and how bad this addon changes when it is installed on Firefox!!! It is simply completely useless except stealing all the information that you ask just to have this addon installed!!!