Something is a tiny bit broken Rated 4 out of 5 stars
A previous reviewer mentioned that they were just getting a little white box in a blue background, and another reviewer brushed it off as "probably the user".
It's not user error.
I was getting the same thing. At first I thought it was an issue with the "Exclude" feature being broken by Firefox's latest update.Then I realized it only happened if one particular folder in my bookmarks was not excluded from display. I thought perhaps a title of a bookmark in the folder was too long. But no, I've got other bookmarks with much longer titles. I thought perhaps MyBookmarks had an upper limit of how many bookmarks it could display. But no, if I try to show *only* that folder, I get the tiny square on the blue background.
This is a good addon, but something inexplicable (to me) is buggy in it. Something about how it's dealing with...a particular text character? I don't know.
Also, it'd be nice if there was an option to show folders as unexpanded, and then click to open the folder and show contents.