Review for Header Tools Improved by bchan
Rated 5 out of 5 stars
I am writing this in reply to elliottqk's comments on September 15. If you are only interested in editing the subject line of messages, you can try the addon EditEmailSubject, which is recently updated to work with TB78.
This review is for a previous version of the add-on (2.3).To create your own collections, you must have a Mozilla Add-ons account.