Ever since I started using Thunderbird mailer, I've always used.
I was feeling tired in editing mail like same content and the same subject.
Well, at find something in Google, it came out a list of search words in the past, I think you have to select the words in result list.
I thought Thunderbird mailer is able to have it function.
I looked for an add-on with similar functionality.
However, I couldn't find the add-in module as expected.
Because there is no way, I created an add-in.
Screen shot
dwEasySubject
Mozilla public Site.