For security purposes, Mozilla applications block links to local files (and directories) from remote files (eg, all internet/intranet content, including this wiki) by default.

 

To turn OFF this behavior (ie, enable file links) see Links to local pages do not work

 

put the following into a user.js or prefs.js file

 

user_pref("capability.policy.policynames", "localfilelinks");
user_pref("capability.policy.localfilelinks.sites", "http://www.foo.com");
user_pref("capability.policy.localfilelinks.checkloaduri.enabled", "allAccess");