- Version 0.5 released
The Folder Categories extension is an extension that allows you to organize your mail folders into categories in the thread pane.
The current release is version 0.5, which is usable in Thunderbird 3.1 beta 2 or higher.
There is currently a known bug that starting up with the Categorized Folders mode will cause the mode name to be displayed as "[object Object]", due to a bug in the Thunderbird source code. This should be fixed for Thunderbird 3.1rc1.