--- a/content/xul/document/src/nsXULPrototypeDocument.cpp
+++ b/content/xul/document/src/nsXULPrototypeDocument.cpp
@@ -783,21 +783,17 @@ void
 nsXULPDGlobalObject::ClearGlobalObjectOwner()
 {
   NS_ASSERTION(!mCachedPrincipal, "This shouldn't ever be set until now!");
 
   // Cache mGlobalObjectOwner's principal if possible.
   if (this != nsXULPrototypeDocument::gSystemGlobal)
     mCachedPrincipal = mGlobalObjectOwner->DocumentPrincipal();
 
-  if (mContext) {
-    mContext->FinalizeContext();
-    mContext = NULL;
-  }
-
+  mContext = NULL;
   mGlobalObjectOwner = NULL;
 }
 
 
 void
 nsXULPDGlobalObject::OnFinalize(JSObject* aObject)
 {
   mJSObject = NULL;

--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -2397,17 +2397,16 @@ nsGlobalWindow::SetDocShell(nsIDocShell*
       // SetArguments(), drop our reference to the arguments.
       mArguments = nsnull;
       mArgumentsLast = nsnull;
       mArgumentsOrigin = nsnull;
     }
 
     if (mContext) {
       mContext->GC(js::gcreason::SET_DOC_SHELL);
-      mContext->FinalizeContext();
       mContext = nsnull;
     }
 
 #ifdef DEBUG
     nsCycleCollector_DEBUG_shouldBeFreed(mContext);
     nsCycleCollector_DEBUG_shouldBeFreed(static_cast<nsIScriptGlobalObject*>(this));
 #endif
   }

--- a/dom/base/nsIScriptContext.h
+++ b/dom/base/nsIScriptContext.h
@@ -71,18 +71,18 @@ public:
 
   virtual nsIScriptObjectPrincipal* GetObjectPrincipal() = 0;
 };
 
 NS_DEFINE_STATIC_IID_ACCESSOR(nsIScriptContextPrincipal,
                               NS_ISCRIPTCONTEXTPRINCIPAL_IID)
 
 #define NS_ISCRIPTCONTEXT_IID \
-{ 0x6a536a37, 0x9773, 0x467e, \
-  { 0x93, 0xb2, 0xdb, 0xe6, 0xe6, 0xec, 0x24, 0xc3 } }
+{ 0xdfaea249, 0xaaad, 0x48bd, \
+  { 0xb8, 0x04, 0x92, 0xad, 0x30, 0x88, 0xd0, 0xc6 } }
 
 /* This MUST match JSVERSION_DEFAULT.  This version stuff if we don't
    know what language we have is a little silly... */
 #define SCRIPTVERSION_DEFAULT JSVERSION_DEFAULT
 
 /**
  * It is used by the application to initialize a runtime and run scripts.
  * A script runtime would implement this interface.
@@ -341,21 +341,16 @@ public:
    * reentrancy issues during the initialization process.
    *
    * @return true if initialized, false if not
    *
    */
   virtual bool IsContextInitialized() = 0;
 
   /**
-   * Called as the global object discards its reference to the context.
-   */
-  virtual void FinalizeContext() = 0;
-
-  /**
    * For garbage collected systems, do a synchronous collection pass.
    * May be a no-op on other systems
    *
    * @return NS_OK if the method is successful
    */
   virtual void GC(js::gcreason::Reason aReason) = 0;
 
   /**

--- a/dom/base/nsJSEnvironment.cpp
+++ b/dom/base/nsJSEnvironment.cpp
@@ -2969,22 +2969,16 @@ nsJSContext::DidInitializeContext()
 
 bool
 nsJSContext::IsContextInitialized()
 {
   return mIsInitialized;
 }
 
 void
-nsJSContext::FinalizeContext()
-{
-  ;
-}
-
-void
 nsJSContext::ScriptEvaluated(bool aTerminated)
 {
   if (aTerminated && mTerminations) {
     // Make sure to null out mTerminations before doing anything that
     // might cause new termination funcs to be added!
     nsJSContext::TerminationFuncClosure* start = mTerminations;
     mTerminations = nsnull;
 

--- a/dom/base/nsJSEnvironment.h
+++ b/dom/base/nsJSEnvironment.h
@@ -138,17 +138,16 @@ public:
   virtual nsresult ConnectToInner(nsIScriptGlobalObject *aNewInner,
                                   JSObject *aOuterGlobal);
   virtual nsresult InitContext();
   virtual nsresult CreateOuterObject(nsIScriptGlobalObject *aGlobalObject,
                                      nsIScriptGlobalObject *aCurrentInner);
   virtual nsresult SetOuterObject(JSObject* aOuterObject);
   virtual nsresult InitOuterWindow();
   virtual bool IsContextInitialized();
-  virtual void FinalizeContext();
 
   virtual void ScriptEvaluated(bool aTerminated);
   virtual void SetTerminationFunction(nsScriptTerminationFunc aFunc,
                                       nsIDOMWindow* aRef);
   virtual bool GetScriptsEnabled();
   virtual void SetScriptsEnabled(bool aEnabled, bool aFireTimeouts);
 
   virtual nsresult SetProperty(JSObject* aTarget, const char* aPropName, nsISupports* aVal);