const s = "network.cookie.cookieBehavior";
const imgTrue = "chrome://mozapps/skin/plugins/pluginGeneric-16.png";
const imgFalse = "data:image/x-icon;base64,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";

var ps = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);

var button = this;
var pref = Application.prefs.get(s);

this.onclick = function(e) {
    if(e.button) return;
    pref.value = (pref.value == 0)? 2: 0;
}
function toggleImage() {
    var not = (pref.value == 2);
    button.image = not ? imgFalse: imgTrue;
    button.checked = not;
}
toggleImage();

var obs = { observe: toggleImage };
ps.addObserver(s, obs, false);

this.onDestroy = function() {
    ps.removeObserver(s, obs, false);
}