diff --git a/js/lib/connection-xpcom.js b/js/lib/connection-xpcom.js
--- a/js/lib/connection-xpcom.js
+++ b/js/lib/connection-xpcom.js
@@ -105,17 +105,16 @@ function badcert_getinterface(aIID)
 {
     return this.QueryInterface(aIID);
 }
 
 BadCertHandler.prototype.QueryInterface =
 function badcert_queryinterface(aIID)
 {
     if (aIID.equals(Components.interfaces.nsIBadCertListener2) ||
-        aIID.equals(Components.interfaces.nsISSLErrorListener) ||
         aIID.equals(Components.interfaces.nsIInterfaceRequestor) ||
         aIID.equals(Components.interfaces.nsISupports))
     {
         return this;
     }
 
     throw Components.results.NS_ERROR_NO_INTERFACE;
 }
@@ -124,22 +123,16 @@ function badcert_queryinterface(aIID)
  * means suppress default the error UI (modal alert).
  */
 BadCertHandler.prototype.notifyCertProblem =
 function badcert_notifyCertProblem(socketInfo, sslStatus, targetHost)
 {
     return true;
 }
 
-BadCertHandler.prototype.notifySSLError =
-function badcert_notifySSLError(socketInfo, error, targetSite)
-{
-    return true;
-}
-
 /**
  * Wraps up various mechanics of sockets for easy consumption by other code.
  *
  * @param binary Provide |true| or |false| here to override the automatic
  *               selection of binary or text streams. This should only ever be
  *               specified as |true| or omitted, otherwise you will be shooting
  *               yourself in the foot on some versions - let the code handle
  *               the choice unless you know you need binary.