Page is a not externally linkable
-- Firefox Browser Usage and Support
---- FireFox 19.0 doesn't support addons
nancyb - 6:45 pm on Feb 28, 2013 (gmt 0)Thread source:: http://www.webmasterworld.com/firefox_browser/4549668.htm
I also have FF 19 and SS 1.45 and SS and most other addons didn't work until I applied the latest update for Win 7. Now all addons are working as expected.
Brought to you by WebmasterWorld: http://www.webmasterworld.com