diff -Nur a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
--- a/browser/app/profile/firefox.js	2012-12-01 16:06:30.000000000 -0200
+++ b/browser/app/profile/firefox.js	2012-12-04 20:42:20.753633713 -0200
@@ -1149,13 +1149,3 @@
 // might keep around more than this, but we'll try to get down to this value).
 // (This is intentionally on the high side; see bug 746055.)
 pref("image.mem.max_decoded_image_kb", 256000);
-
-// Example social provider
-pref("social.manifest.facebook", "{\"origin\":\"https://www.facebook.com\",\"name\":\"Facebook Messenger\",\"workerURL\":\"https://www.facebook.com/desktop/fbdesktop2/socialfox/fbworker.js.php\",\"iconURL\":\"data:image/x-icon;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8%2F9hAAAAX0lEQVQ4jWP4%2F%2F8%2FAyUYTFhHzjgDxP9JxGeQDSBVMxgTbUBCxer%2Fr999%2BQ8DJBuArJksA9A10s8AXIBoA0B%2BR%2FY%2FjD%2BEwoBoA1yT5v3PbdmCE8MAshhID%2FUMoDgzUYIBj0Cgi7ar4coAAAAASUVORK5CYII%3D\",\"sidebarURL\":\"https://www.facebook.com/desktop/fbdesktop2/?socialfox=true\"}");
-// Comma-separated list of nsIURI::prePaths that are allowed to activate
-// built-in social functionality.
-pref("social.activation.whitelist", "https://www.facebook.com");
-pref("social.sidebar.open", true);
-pref("social.sidebar.unload_timeout_ms", 10000);
-pref("social.active", false);
-pref("social.toast-notifications.enabled", true);