Review for Extra Folder Columns by Den Miller
Rated 5 out of 5 stars
This is great.
It's amazing how often the first job after installing new software is to switch off half of the new features, and put back half the old ones!
Fair enough to keep things uncluttered if you're mystified with what all these numbers mean, or don't care, but viewing folder size information is pretty much essential for me. Why did Thunderbird feel the need to remove the choice though? It can't have gained much.
Anyway, well done on this.
To create your own collections, you must have a Mozilla Add-ons account.