--- a/testing/profiles/prefs_general.js
+++ b/testing/profiles/prefs_general.js
@@ -55,16 +55,17 @@ user_pref("font.size.inflation.minTwips"
 user_pref("extensions.enabledScopes", 5);
 // Disable metadata caching for installed add-ons by default
 user_pref("extensions.getAddons.cache.enabled", false);
 // Disable intalling any distribution add-ons
 user_pref("extensions.installDistroAddons", false);
 
 user_pref("geo.wifi.uri", "http://%(server)s/tests/dom/tests/mochitest/geolocation/network_geolocation.sjs");
 user_pref("geo.wifi.testing", true);
+user_pref("geo.wifi.logging.enabled", true);
 user_pref("geo.ignore.location_filter", true);
 
 user_pref("camino.warn_when_closing", false); // Camino-only, harmless to others
 
 // Make url-classifier updates so rare that they won't affect tests
 user_pref("urlclassifier.updateinterval", 172800);
 // Point the url-classifier to the local testing server for fast failures
 user_pref("browser.safebrowsing.gethashURL", "http://%(server)s/safebrowsing-dummy/gethash");