Review for Extra Folder Columns by ForteTwo
Rated 2 out of 5 stars
Only a 2 star 'cause, though it added back the functionality of the missing Expanded columns - GOOD... It removed the associated account names from the inboxess - BAD... I have several accounts that I monitor seeing each one simply as Inbox is a little rather unhelpful. So, currently this add-on is useless to me and has been uninstalled :(
This review is for a previous version of the add-on (0.4).To create your own collections, you must have a Mozilla Add-ons account.