Review for Quicker Filer by Gary Oberbrunner
Rated 4 out of 5 stars
Very nice, can't live without it. One minor bug: the default size of the popup window is much too narrow for deeply nested folders. You can enlarge it though, and it remembers the new size.
This review is for a previous version of the add-on (0.4.0).To create your own collections, you must have a Mozilla Add-ons account.