TotalMessage is a Thunderbird extension that will create a new look for for the attachment and header panes, based on HTML5.
TotalMessage is an open source add-on designed to work with Mozilla Thunderbird 17.0 and later.
How to Install in Thunderbird:
1. Right-click the link below and choose "Save Link As..." to download and save the file to your hard disk.
2. In Mozilla Thunderbird, open Add-ons from the Tools menu.
3. Click the Install button, and locate/select the file you downloaded and click "OK".
- Update: compatibility with Thunderbird 24.