|User since||November 20, 2012|
|Number of add-ons developed||0 add-ons|
|Average rating of developer's add-ons||Not yet rated|
Thunderbird 17 Rated 5 out of 5 stars
mail.tabs.drawInTitlebar=false seems to be what you search for?This review is for a previous version of the add-on (18.104.22.168).