Adds a button for every media element (videos, images). Clicking opens a new page offering download options. You have to select quality and then it downloads. It always mentions that some rights of the addon has been changed and I should be reinstalled. The mention is a big red bar on the top of your screen. Following the procedure returns normal use however you could wait, it seems to go away and then it returns. So two clicks and a page switch followed by a reinstall question. + I could download everything I want. Neutral: the procedure. -- The need to reinstall. I'm not running the latest firefox so it might be self inflicted at this point.