When I try to download a 40 min video, it could not download the video. When I tried to download a 2 hour video, it would not download. It could download 6 minute videos, though.*

If you're using this to download shorter content, then this could work for you; but it you're planning on downloading longer content, then this browser extension may not work work for you.

Though, personally I wouldn't like to gamble on whether this extension may work or not, each time I attempt to use it, so I would like to think it is better off finding another extension.

*It came back with an error message. I can't put write the error message here because Firefox doesn't allow URLs in reviews.