MuteThread is a Thunderbird extension that brings up a hidden functionality of the popular email client, ignoring threads in newsgroups.
MuteThread is an add-on designed to work with the Mozilla Thunderbird (3.1 and later) email client.
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".
· Mozilla Thunderbird