function isParentProcess() { let appInfo = Cc["@mozilla.org/xre/app-info;1"]; return ( !appInfo || Services.appinfo.processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT ); } function run_test() { if (!isParentProcess()) { do_load_child_test_harness(); var pb = Services.prefs; 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"); } }