Rated 4 out of 5 stars

The best video-grabbing extension for Linux I've ever seen and a definite must for anybody's toolbox.

...though I do hate and mistrust how commercialized it feels and I really frown on donation requests in native UIs. If I ever find a properly libre/open-source extension which grabs videos as reliably and on as wide a range of sites as this, I'm switching immediately.

This review is for a previous version of the add-on (4.9.3).