RemoveSrcset.user.js : Remove URL in <img srcset="..." src="..."> for Firefox Addon 'Image Block' problem https://addons.mozilla.org/ja/firefox/addon/image-block/reviews/

RemoveSrcset.user.js

// ==UserScript==
// @name           RemoveSrcset
// @version        2015.11.05
// @namespace      http://webaborn.herokuapp.com
// @description    Remove URL in <img srcset="..." src="...">
// @include        *
// ==/UserScript
(function () {
  var removeSrcset = function(node){
    var i, len, imgNode;
    imgNode = document.evaluate('.//img/@srcset/..', node, null, 6, null);
    for (i=0, len=imgNode.snapshotLength; i<len; i++) {
      imgNode.snapshotItem(i).removeAttribute('srcset');
      imgNode.snapshotItem(i).setAttribute('src', '');
    }
  };
  
  removeSrcset(document);
  document.addEventListener('DOMNodeInserted', function(e){ removeSrcset(e.target); }, false);
  document.addEventListener('DOMCharacterDataModified', function(e){ removeSrcset(e.target); }, false);
  document.addEventListener('DOMAttrModified', function(e){ removeSrcset(e.target); }, false);
})();