App has been extremely unreliable for the past few years on many websites. Looooong periods where it simply won't work or throws errors, then an update comes out and it'll work for a few weeks or maybe months, then the process repeats.

Sadly this seems to happen with all of the video download tools out there so this may as much due to malicious coding efforts of the video hosters than the design of this addon, but the user experience is frustrating enough to warrant a low star rating.