Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130215 Thunderbird/17.0.3
Also note that I could not get Multimon to work in 3.6.5.1 prior to
making changes in 3.7 (although it didn't work differently). On the
premise that was issue with my install of that version I did not work
through resolving those issues.