--- a/caps/idl/nsIScriptSecurityManager.idl
+++ b/caps/idl/nsIScriptSecurityManager.idl
@@ -5,17 +5,17 @@
 
 #include "nsISupports.idl"
 #include "nsIPrincipal.idl"
 #include "nsIXPCSecurityManager.idl"
 interface nsIURI;
 interface nsIChannel;
 interface nsIDocShell;
 
-[scriptable, uuid(b17f9a0b-c36b-4961-8f19-11e03f43436d)]
+[scriptable, uuid(ae486501-ec57-4ec8-a565-6880ca4ae6c4)]
 interface nsIScriptSecurityManager : nsIXPCSecurityManager
 {
     ///////////////// Security Checks //////////////////
     /**
      * Checks whether the running script is allowed to access aProperty.
      */
     [noscript] void checkPropertyAccess(in JSContextPtr aJSContext,
                                         in JSObjectPtr aJSObject,
@@ -162,16 +162,23 @@ interface nsIScriptSecurityManager : nsI
 
     /**
      * Returns a principal with that has the same origin as uri and is not part
      * of an appliction.
      * The returned principal will have appId = NO_APP_ID.
      */
     nsIPrincipal getNoAppCodebasePrincipal(in nsIURI uri);
 
+    /**
+     * Legacy name for getNoAppCodebasePrincipal.
+     *
+     * @deprecated use getNoAppCodebasePrincipal instead.
+     */
+    [deprecated] nsIPrincipal getCodebasePrincipal(in nsIURI uri);
+
     ///////////////////////
     /**
      * Return the principal of the specified object in the specified context.
      */
     [noscript] nsIPrincipal getObjectPrincipal(in JSContextPtr cx,
                                                in JSObjectPtr obj);
 
     /**

--- a/caps/src/nsScriptSecurityManager.cpp
+++ b/caps/src/nsScriptSecurityManager.cpp
@@ -1866,16 +1866,23 @@ NS_IMETHODIMP
 nsScriptSecurityManager::GetNoAppCodebasePrincipal(nsIURI* aURI,
                                                    nsIPrincipal** aPrincipal)
 {
   return GetCodebasePrincipalInternal(aURI,  nsIScriptSecurityManager::NO_APP_ID,
                                       false, aPrincipal);
 }
 
 NS_IMETHODIMP
+nsScriptSecurityManager::GetCodebasePrincipal(nsIURI* aURI,
+                                              nsIPrincipal** aPrincipal)
+{
+  return GetNoAppCodebasePrincipal(aURI, aPrincipal);
+}
+
+NS_IMETHODIMP
 nsScriptSecurityManager::GetAppCodebasePrincipal(nsIURI* aURI,
                                                  uint32_t aAppId,
                                                  bool aInMozBrowser,
                                                  nsIPrincipal** aPrincipal)
 {
   NS_ENSURE_TRUE(aAppId != nsIScriptSecurityManager::UNKNOWN_APP_ID,
                  NS_ERROR_INVALID_ARG);
 

--- a/ipc/testshell/XPCShellEnvironment.cpp
+++ b/ipc/testshell/XPCShellEnvironment.cpp
@@ -753,16 +753,22 @@ FullTrustSecMan::GetSimpleCodebasePrinci
 NS_IMETHODIMP
 FullTrustSecMan::GetNoAppCodebasePrincipal(nsIURI *aURI,
                                            nsIPrincipal **_retval)
 {
     return GetSimpleCodebasePrincipal(aURI, _retval);
 }
 
 NS_IMETHODIMP
+FullTrustSecMan::GetCodebasePrincipal(nsIURI *aURI, nsIPrincipal **_retval)
+{
+    return GetSimpleCodebasePrincipal(aURI, _retval);
+}
+
+NS_IMETHODIMP
 FullTrustSecMan::GetAppCodebasePrincipal(nsIURI *aURI,
                                          uint32_t aAppId,
                                          bool aInMozBrowser,
                                          nsIPrincipal **_retval)
 {
     return GetSimpleCodebasePrincipal(aURI, _retval);
 }
 

--- a/js/xpconnect/shell/xpcshell.cpp
+++ b/js/xpconnect/shell/xpcshell.cpp
@@ -1390,16 +1390,23 @@ FullTrustSecMan::GetSimpleCodebasePrinci
 
 /* [noscript] nsIPrincipal getNoAppCodebasePrincipal (in nsIURI aURI); */
 NS_IMETHODIMP
 FullTrustSecMan::GetNoAppCodebasePrincipal(nsIURI *aURI, nsIPrincipal **_retval)
 {
     return GetSimpleCodebasePrincipal(aURI, _retval);
 }
 
+/* [noscript] nsIPrincipal getCodebasePrincipal (in nsIURI aURI); */
+NS_IMETHODIMP
+FullTrustSecMan::GetCodebasePrincipal(nsIURI *aURI, nsIPrincipal **_retval)
+{
+    return GetSimpleCodebasePrincipal(aURI, _retval);
+}
+
 /* [noscript] nsIPrincipal getAppCodebasePrincipal (in nsIURI aURI, unsigned long appid, bool inMozBrowser); */
 NS_IMETHODIMP
 FullTrustSecMan::GetAppCodebasePrincipal(nsIURI *aURI, uint32_t aAppId, bool aInMozBrowser, nsIPrincipal **_retval)
 {
     return GetSimpleCodebasePrincipal(aURI, _retval);
 }
 
 /* [noscript] nsIPrincipal getDocShellCodebasePrincipal (in nsIURI aURI, nsIDocShell docShell); */