Rated 3 out of 5 stars

Extension works fine with Mnenhy when you strip the display message header to a minimum in View -> Headers -> Extended Normal Headers. Then go to Customize and kill all unnecessary headers.
One problem remains though: When forwarding a message you still get a full message header with zillions of unneeded fields. That is a pain and should be configurable. It is probably a Mnenhy problem, but that also affects the use of this extension

This review is for a previous version of the add-on (1.3).