Allow Empty Subject 0.3 Requires Restart
by Jeroen Peters
Allows Thunderbird to send message without a subject.
Visit my Allow Empty Subject site for recent versions and news.
About this Add-on
It is not about promoting messages without a subject, it is about customizing Thunderbird. It is amazing what you can customize in Thunderbird with CSS and extensions, it felt strange you could not customize the "no subject" dialog.