Review for FlashGot Mass Downloader by Limvot
Rated 5 out of 5 stars
Superb. I really like this add-on, great capabilities.
It works on almost every site that doesn't have really good protection.
The only sites I've found that it doesn't work on are Hulu, TBS, and USAnetwork.
To create your own collections, you must have a Mozilla Add-ons account.