diff --git a/modules/libjar/nsIJARURI.idl b/modules/libjar/nsIJARURI.idl
index 439decd0c4f..55749dd90c5 100644
--- a/modules/libjar/nsIJARURI.idl
+++ b/modules/libjar/nsIJARURI.idl
@@ -47,7 +47,7 @@
  *
  * The nsIURL methods operate on the <jar-entry> part of the spec.
  */
-[scriptable, uuid(ba32f809-5adf-4191-866a-1cddf60548f7)]
+[scriptable, uuid(c95d481a-c0ec-43cc-8320-43842b1df597)]
 interface nsIJARURI : nsIURL {
 
     /**
diff --git a/modules/libpr0n/decoders/icon/nsIIconURI.idl b/modules/libpr0n/decoders/icon/nsIIconURI.idl
index e8a9a4eb376..fd31e2e37d4 100644
--- a/modules/libpr0n/decoders/icon/nsIIconURI.idl
+++ b/modules/libpr0n/decoders/icon/nsIIconURI.idl
@@ -73,7 +73,7 @@
    *   Description: The mime type we want an icon for. This is ignored by stock images.
    */
 
-[scriptable, uuid(5d8a4518-bebf-4e7e-bad0-3e6737b3d7f4)]
+[scriptable, uuid(b6a47fa0-2f1e-4084-ae5f-bdebab4d1cc3)]
 interface nsIMozIconURI : nsIURI 
 {
   /**
diff --git a/netwerk/base/public/nsIFileURL.idl b/netwerk/base/public/nsIFileURL.idl
index d8094621c18..3ecb735e29a 100644
--- a/netwerk/base/public/nsIFileURL.idl
+++ b/netwerk/base/public/nsIFileURL.idl
@@ -45,7 +45,7 @@ interface nsIFile;
  * an URL.  The URL scheme need not be file:, since other local protocols may
  * map URLs to files (e.g., resource:).
  */
-[scriptable, uuid(e693cb4f-d835-4068-9e14-76de8bd9df1d)]
+[scriptable, uuid(44c14c16-07b4-48fb-b44b-0c8986697a17)]
 interface nsIFileURL : nsIURL
 {
     /**
diff --git a/netwerk/base/public/nsIURI.idl b/netwerk/base/public/nsIURI.idl
index 36ad6583aab..8b8a8e18798 100644
--- a/netwerk/base/public/nsIURI.idl
+++ b/netwerk/base/public/nsIURI.idl
@@ -101,7 +101,7 @@
  * we will need to add additional checks there for all intermediate IIDs, until
  * nsPrincipal is fixed to serialize its URIs as nsISupports (bug 662693).
  */
-[scriptable, uuid(d6d04c36-0fa4-4db3-be05-4a18397103e2)]
+[scriptable, uuid(12120b20-0929-40e9-88cf-6e08766e8b23)]
 interface nsIURI : nsISupports
 {
     /************************************************************************
diff --git a/netwerk/base/public/nsIURL.idl b/netwerk/base/public/nsIURL.idl
index 4acb36f98ed..5c94604fe15 100644
--- a/netwerk/base/public/nsIURL.idl
+++ b/netwerk/base/public/nsIURL.idl
@@ -54,7 +54,7 @@
  *                            |
  *                        filePath
  */
-[scriptable, uuid(55e824ca-f1bb-4452-9e14-fcfa1ff091ce)]
+[scriptable, uuid(eab18ad5-e3be-4eb3-9c78-7d4e750200d6)]
 interface nsIURL : nsIURI
 {
     /*************************************************************************