Review for Extra Folder Columns by krmazouni
Rated 4 out of 5 stars
As mentioned previously in other reviews, this version (0.2) does not work out-of-the-box with TB 3.0b2.
To make it work, you have to unzip the .xpi file and to edit install.rdf to change the maxVersion attribute to:
3.0b3pre
instead of:
3.0b2pre
To create your own collections, you must have a Mozilla Add-ons account.