Mozilla really do need to remove this extension from the "recommended" section. Or maybe even remove it altogether at this point.
Not only do you have to download an app to make it work, it also now adds a large watermark in the corner of every video you download. If you want to remove the watermark you need to pay $28.50!! And oh, quick reminder, you are forking this amount out for a BROWSER EXTENSION!
I honestly wouldn't mind paying for this extension if it was five dollars. Maybe even ten! But paying almost $30 for this is ridiculous. Yet another example of developers who got too greedy.
If you already have this addon installed in your Firefox, and are reading this review, delete it immediately!