--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -1463,33 +1463,38 @@ pref("gestures.enable_single_finger_inpu
 pref("editor.resizing.preserve_ratio",       true);
 pref("editor.positioning.offset",            0);
 
 pref("dom.max_chrome_script_run_time", 20);
 pref("dom.max_script_run_time", 10);
 
 // Hang monitor timeout after which we kill the browser, in seconds
 // (0 is disabled)
+// Temporarily disabled on mac due to bug 705154
+#ifdef XP_MACOSX
+pref("hangmonitor.timeout", 0);
+#else
 #ifndef DEBUG
 pref("hangmonitor.timeout", 30);
 #else
 pref("hangmonitor.timeout", 0);
 #endif
+#endif
 
 #ifndef DEBUG
 // How long a plugin is allowed to process a synchronous IPC message
 // before we consider it "hung".
-pref("dom.ipc.plugins.timeoutSecs", 45);
+pref("dom.ipc.plugins.timeoutSecs", 25);
 // How long a plugin process will wait for a response from the parent
 // to a synchronous request before terminating itself. After this
 // point the child assumes the parent is hung.
 pref("dom.ipc.plugins.parentTimeoutSecs", 15);
 // How long a plugin launch is allowed to take before
 // we consider it failed.
-pref("dom.ipc.plugins.processLaunchTimeoutSecs", 45);
+pref("dom.ipc.plugins.processLaunchTimeoutSecs", 25);
 #else
 // No timeout in DEBUG builds
 pref("dom.ipc.plugins.timeoutSecs", 0);
 pref("dom.ipc.plugins.processLaunchTimeoutSecs", 0);
 pref("dom.ipc.plugins.parentTimeoutSecs", 0);
 #endif
 
 // Disable oopp for standard java. They run their own process isolation (which