--- a/firefox.rst	Wed Dec 25 10:32:37 2013 +0200
+++ b/firefox.rst	Wed Dec 25 10:42:46 2013 +0200
@@ -514,3 +514,17 @@
   user_pref("services.sync.prefs.sync.browser.safebrowsing.enabled", false);
   user_pref("services.sync.prefs.sync.browser.safebrowsing.malware.enabled;false", false);
 
+Disable geo location.
+=====================
+::
+
+  user_pref("geo.enabled", false);
+
+You can fake your location by JSON like::
+
+  {"location":{"latitude":48.861426,2.338929,"longitude":2.338929, "accuracy":20.0}}
+
+in file pointed by::
+
+  user_pref("geo.wifi.uri", "file:///home/user/fake-geo.json");
+