How to add event respond after mail browser loaded mail page successful? (<browser id="messagepane">in mail3PaneWindowVertLayout.xul) I want to add a crypted mail flag buttom on "msgHeaderView" header. I try to add Javascript function in messageHeaderSink.onEndHeaders in msgHdrViewOverlay.js ,but it was called before mail mime decode. Where should I inster the function call in right place? thanks DingDing