Did NOT work on several sites I tried it on.

splendid!!

Too many permissions

For me the best plugin to download videos directly from a website! Works great with Youtube as well.

Király

Good

Really fast and simple to use downloader. Thanks :)

parfait

While every other downloader needs you to install dubious software from who knows where, this one just needs you to click a button. It is simple, easy and efficient.

Since I am rating it low, I will explain.

Sometimes it does not download the video.
For example the following does not work:
https://www.youtube.com/watch?v=LPxIssabhTc

Sometimes it downloads at 360p, although the video is playing at 1080.
Example:
https://www.youtube.com/watch?v=sIaT8Jl2zpI

As the following page states:

https://support.mozilla.org/en-US/kb/permission-request-messages-firefox-extensions#w_access-your-data-for-all-websites

"The extension can read the content of any web page you visit as well as data you enter into those web pages, such as usernames and passwords."

Can't download any resolution above 720p, but otherwise great.