我不想安装Flash插件，但是在访问需要这个插件的网站时，总会弹出"安装缺失插件"面板，每次都需要手动去关闭，不胜其烦。有没有办法让这个面板不再弹出？

hello dragonsun7, you can disable the infobar for missing plugins like this: enter '''about:config''' into the firefox location bar & search for the preference named '''plugins.hide_infobar_for_missing_plugin''' - double-click and toggle that entry to '''true'''.