MuteThread 0.2 Requires Restart
by dmose
For a long time, Thunderbird has supported ignoring threads in newsgroups. This is a prototype that explores bringing that functionality to email.
About this Add-on
MuteThread adds Ignore Thread and Ignore Subthread menu entries to the Message menu for email messages, like Thunderbird already does for newsgroup messages.
WARNING: It's possible to lose track of email threads by inadvertently hitting "K" (the shortcut), and not notice.
To see which messages, if any, are hidden from view in a given folder, select the "View -> Threads -> Ignored Threads" menu item while in that folder. Due to a bug in current versions of Thunderbird, you'll have to exit and re-enter the folder in order for the ignored threads to re-appear.