Review for FlashGot Mass Downloader by Greg Palmer
Rated 5 out of 5 stars
This is one of those Add-ons that I immediately install every time I install Firefox. It would be even better if this functionality was built right into Firefox.
Anyway, I find it invaluable. It gets used every day. Very fast and well implemented. It can be accessed quickly but is unobtrusive.
To create your own collections, you must have a Mozilla Add-ons account.