const Ci = Components.interfaces; const Cc = Components.classes; function isParentProcess() { let appInfo = Cc["@mozilla.org/xre/app-info;1"]; return (!appInfo || appInfo.getService(Ci.nsIXULRuntime).processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT); } function run_test() { if (isParentProcess()) { do_load_child_test_harness(); var pb = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch); // these prefs are set after the child has been created. pb.setBoolPref("Test.IPC.bool.new", true); pb.setIntPref("Test.IPC.int.new", 23); pb.setCharPref("Test.IPC.char.new", "hey"); run_test_in_child("test_observed_prefs.js"); } else { } }