Well, if only life is so simple. Finding out the ‘actual’ location where these extensions are stored is not a trivial task even if one spend time searching the web for answer (try searching Google). In fact, one might initially think that the extension should be rightfully stored in Firefox’s directory especially if there is actually a ‘extensions’ directory exists within the program directory. Disappointedly, none is found there.
Anyway, let’s not test thy patience anymore. So here is the quick answer:
You know ‘Whatever’ when you reach the Profiles directory.
C:\Documents and Settings\UserName\Application Data