Bug 1312022 - Keep alive content processes on bc and dt. r=mrbkap

testing/mochitest/browser-test.js

@@ -104,6 +104,14 @@ function testInit() {
   }
   if (gConfig.e10s) {
     e10s_init();
+
+    let processCount = prefs.getIntPref("dom.ipc.processCount", 1);
+    if (processCount > 1) {
+      // Currently starting a content process is slow, to aviod timeouts, let's
+      // keep alive content processes.
+      prefs.setIntPref("dom.ipc.keepProcessesAlive", processCount);
+    }
+
     let globalMM = Cc["@mozilla.org/globalmessagemanager;1"]
                      .getService(Ci.nsIMessageListenerManager);
     globalMM.loadFrameScript("chrome://mochikit/content/shutdown-leaks-collector.js", true);