--- a/netwerk/protocol/http/nsHttpConnectionInfo.cpp
+++ b/netwerk/protocol/http/nsHttpConnectionInfo.cpp
@@ -39,21 +39,25 @@ nsHttpConnectionInfo::SetOriginServer(co
     mHashKey.AppendInt(keyPort);
 
     if (mUsingHttpProxy)
         mHashKey.SetCharAt('P', 0);
     if (mUsingSSL)
         mHashKey.SetCharAt('S', 1);
 
     // NOTE: for transparent proxies (e.g., SOCKS) we need to encode the proxy
-    // type in the hash key (this ensures that we will continue to speak the
+    // info in the hash key (this ensures that we will continue to speak the
     // right protocol even if our proxy preferences change).
     if (!mUsingHttpProxy && ProxyHost()) {
         mHashKey.AppendLiteral(" (");
         mHashKey.Append(ProxyType());
+        mHashKey.Append(':');
+        mHashKey.Append(ProxyHost());
+        mHashKey.Append(':');
+        mHashKey.AppendInt(ProxyPort());
         mHashKey.Append(')');
     }
 }
 
 nsHttpConnectionInfo*
 nsHttpConnectionInfo::Clone() const
 {
     nsHttpConnectionInfo* clone = new nsHttpConnectionInfo(mHost, mPort, mProxyInfo, mUsingSSL);