<http://schema.org/description>
"I recently discovered that it is possible to use Firefox Developer Tools with Thunderbird. Philipp Kewisch has done a fantastic job of his Google Summer of Code 2013 Project to bring Firefox Developer Tools to Thunderbird. Starting with Thunderbird 24...."^^<http://www.w3.org/2001/XMLSchema#string>
<http://flailingmonkey.com/debugging-thunderbird-using-firefox-developer-tools/>