helloworld@mozilla.doslash.org Hello World (Firefox 1.5 edition) 1.0 Classic first extension from MozillaZine KB Nickolay Ponomarev A person who helped you Another one http://kb.mozillazine.org/Getting_started_with_extension_development {ec8030f7-c20a-464f-9b0e-13a3a9e97384} 1.5 1.5.0.*