From "about:support":

Name                            Version   Enabled
---------------------------     -------   -------
AutoPager                       0.6.2.4   true
Dictionary for Perapera-kun     1.0       true
DOM Inspector                   2.0.8     true
DownloadHelper                  4.8.3     true
Firebug                         1.6.2     true
Forecastfox Weather             2.0.2     true
Glue                            4.5.24    false
Greasemonkey                    0.9.1     true
Live HTTP headers               0.16      true
Perapera-kun Translator         2.1.1     true
ReminderFox                     1.9.9.2   false
ScrapBook                       1.3.7     true
Surf Canyon                     3.1.2     true
Web Developer                   1.1.9     true
Ubuntu Firefox Modifications    0.9rc2    true
Adblock Plus                    1.3.3     true
DNSSEC Validator                1.0.4     false
ChatZilla                       0.9.86    true
NoScript                        2.0.9.8   true

(NoScript has been set to allow the site my wiki is on.)