TBExtInt
Software: Firefox 0.9 to 3.0.*, Thunderbird 1.5-3.0a1
Homepage: http://gamespottingnetworks.com/
AMO Listing/Download (sandbox)
Direct DL: Here
OS: Windows, Mac, Linux
Tired of having to download extensions and drag them into Thunderbird, then delete the original file? Want to install Thunderbird extensions quickly within Firefox? This is the extension for you! Install this into both Firefox and Thunderbird for it to work. Thunderbird version not compatible with ThunderBrowse
WebDemo:
http://thunderbrowse.com/tbextint-demo/ (really old)
Original Announcement:
http://www.thunderbrowse.com/thunderblog/2008/04/27/announcing-tbextint/