diff --git a/extensions/cookie/nsCookiePermission.cpp b/extensions/cookie/nsCookiePermission.cpp
index 37a420e13a72..6ab38873b990 100644
--- a/extensions/cookie/nsCookiePermission.cpp
+++ b/extensions/cookie/nsCookiePermission.cpp
@@ -6,7 +6,6 @@
 
 #include "nsCookiePermission.h"
 
-#include "mozIThirdPartyUtil.h"
 #include "nsICookie2.h"
 #include "nsIServiceManager.h"
 #include "nsICookieManager.h"
@@ -60,8 +59,6 @@ bool nsCookiePermission::Init() {
   nsresult rv;
   mPermMgr = do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
   if (NS_FAILED(rv)) return false;
-  mThirdPartyUtil = do_GetService(THIRDPARTYUTIL_CONTRACTID, &rv);
-  if (NS_FAILED(rv)) return false;
 
   return true;
 }
diff --git a/extensions/cookie/nsCookiePermission.h b/extensions/cookie/nsCookiePermission.h
index 852645059732..8217327ce6f1 100644
--- a/extensions/cookie/nsCookiePermission.h
+++ b/extensions/cookie/nsCookiePermission.h
@@ -8,8 +8,6 @@
 #include "nsICookiePermission.h"
 #include "nsIPermissionManager.h"
 #include "nsCOMPtr.h"
-#include "mozIThirdPartyUtil.h"
-
 
 class nsCookiePermission final : public nsICookiePermission {
  public:
@@ -25,12 +23,9 @@ class nsCookiePermission final : public nsICookiePermission {
  private:
   ~nsCookiePermission() = default;
 
-  bool EnsureInitialized() {
-    return (mPermMgr != nullptr && mThirdPartyUtil != nullptr) || Init();
-  };
+  bool EnsureInitialized() { return (mPermMgr != nullptr) || Init(); };
 
   nsCOMPtr<nsIPermissionManager> mPermMgr;
-  nsCOMPtr<mozIThirdPartyUtil> mThirdPartyUtil;
 };
 
 #endif