userContent.js の管理ツールを実験的に書いてみた．
UCJSToolkit が同封のじゃないと更新がうまく行かないので，そっちも入れ替えて使ってください．
http://www6.uploader.jp/dl/script/script_uljp00101.zip.html

>>629 のスクリプト集の Fake Referrer が何かおかしかったので修正．
{
let Cc = Components.classes;
let Ci = Components.interfaces;
Cc['@mozilla.org/observer-service;1'].getService(Ci.nsIObserverService).addObserver({
observe: function(subject,topic,data){
if(topic != 'http-on-modify-request') return;
var http = subject.QueryInterface(Ci.nsIHttpChannel);
if(http.referrer && http.referrer.host != http.originalURI.host) http.setRequestHeader('Referer',http.originalURI.spec.replace(/[^/]+$/,''),false);
}
},'http-on-modify-request',false);
}