--- a/netwerk/test/httpserver/httpd.js
+++ b/netwerk/test/httpserver/httpd.js
@@ -49,17 +49,17 @@ const CC = Components.Constructor;
 const PR_UINT32_MAX = Math.pow(2, 32) - 1;
 
 /** True if debugging output is enabled, false otherwise. */
 var DEBUG = false; // non-const *only* so tweakable in server tests
 
 /** True if debugging output should be timestamped. */
 var DEBUG_TIMESTAMP = false; // non-const so tweakable in server tests
 
-var gGlobalObject = this;
+var gGlobalObject = Cu.getGlobalForObject(this);
 
 /**
  * Asserts that the given condition holds.  If it doesn't, the given message is
  * dumped, a stack trace is printed, and an exception is thrown to attempt to
  * stop execution (which unfortunately must rely upon the exception not being
  * accidentally swallowed by the code that uses it).
  */
 function NS_ASSERT(cond, msg)

--- a/services/sync/tps/extensions/mozmill/resource/stdlib/httpd.js
+++ b/services/sync/tps/extensions/mozmill/resource/stdlib/httpd.js
@@ -49,17 +49,17 @@ const CC = Components.Constructor;
 const PR_UINT32_MAX = Math.pow(2, 32) - 1;
 
 /** True if debugging output is enabled, false otherwise. */
 var DEBUG = false; // non-const *only* so tweakable in server tests
 
 /** True if debugging output should be timestamped. */
 var DEBUG_TIMESTAMP = false; // non-const so tweakable in server tests
 
-var gGlobalObject = this;
+var gGlobalObject = Cu.getGlobalForObject(this);
 
 /**
  * Asserts that the given condition holds.  If it doesn't, the given message is
  * dumped, a stack trace is printed, and an exception is thrown to attempt to
  * stop execution (which unfortunately must rely upon the exception not being
  * accidentally swallowed by the code that uses it).
  */
 function NS_ASSERT(cond, msg)

--- a/toolkit/components/extensions/ExtensionCommon.jsm
+++ b/toolkit/components/extensions/ExtensionCommon.jsm
@@ -27,17 +27,17 @@ XPCOMUtils.defineLazyModuleGetters(this,
   PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.jsm",
   Schemas: "resource://gre/modules/Schemas.jsm",
 });
 
 XPCOMUtils.defineLazyServiceGetter(this, "styleSheetService",
                                    "@mozilla.org/content/style-sheet-service;1",
                                    "nsIStyleSheetService");
 
-const global = this;
+const global = Cu.getGlobalForObject(this);
 
 Cu.import("resource://gre/modules/ExtensionUtils.jsm");
 
 var {
   DefaultMap,
   DefaultWeakMap,
   EventEmitter,
   ExtensionError,