Review for Extra Folder Columns by Craig Louis
Rated 3 out of 5 stars
Thanks for this. It's a necessary add-on, to restore an obvious needed base functionality....
This feature really should be restored to the base product, but since it's not currently included, this add-on is vital.
The only reason I don't give this four or five stars is that it seems that the user must activate folder content columns after the 3.x upgrade wizard installs the add-on. No problem for me, but not obvious for the lay user.
To create your own collections, you must have a Mozilla Add-ons account.