Rated 5 out of 5 stars

Essential add-on whether you want to fix the bugs in Firefox related to the Edit Bookmark panel or whether you just want the custom sizing for lots of folders/bookmarks. I had only one small annoyance with it--the default panel [size] would pop-up first before doing a "quick-step" into one's custom sizing. I fixed this by simply adding a little CSS to make the panel the custom size regardless.

This review is for a previous version of the add-on (2.3.0.1-signed).