--- a/testing/marionette/driver.js
+++ b/testing/marionette/driver.js
@@ -99,19 +99,19 @@ this.GeckoDriver = function(appName, sto
   this.stopSignal_ = stopSignal;
 
   this.sessionId = null;
   this.wins = new browser.Windows();
   this.browsers = {};
   // points to current browser
   this.curBrowser = null;
   this.context = Context.CONTENT;
-  this.scriptTimeout = null;
+  this.scriptTimeout = 30000;  // 30 seconds
   this.searchTimeout = null;
-  this.pageTimeout = null;
+  this.pageTimeout = 300000;  // five minutes
   this.timer = null;
   this.inactivityTimer = null;
   this.marionetteLog = new logging.ContentLogger();
   // topmost chrome frame
   this.mainFrame = null;
   // chrome iframe that currently has focus
   this.curFrame = null;
   this.mainContentFrameId = null;