Rated 2 out of 5 stars
This was the only free (not freemium) and complete (all resolutions) downloader for Youtube but:
- on Firefox 52 ESR, the latest 2 versions stopped working (unclickable menu).
- lately, v5.7.31 causes some heavy memory leak on Youtube that hangs the browser.
- the dev wanted to completely rewrite the addon as a webextension, but there are no news since months. And the email address seems deactivated. This extension has probably been abandoned. :(