http://mycroft.mozdev.org/deepdocs/quickstart.html#c192 Jentoo: POST is possible in Firefox 2.0 using OpenSearch. See - http://developer.mozilla.org/en/docs/Creating_OpenSearch_plugins_for_Firefox Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1) Gecko/20061010 Firefox/2.0