Tipp für alle (Pseudo-) Schrauber: Inspector Widget

/*--------------------------------------------------------
      Element Inspector
      by LouCypher (aka Zoolcar9)


      Right click anywhere on content or browser window
      to inspect the element with DOMi
  --------------------------------------------------------*/


/* FUNKTIONIERT NICHT BEI AKTIVIERTEM RSS-TICKER!!!!!!!!! */


(function() {
  if(typeof inspectDOMDocument != "function") {
    var errMsg = "inspectChrome: DOM Inspector is not installed" +
                 "or is disabled";
    throw new Error(errMsg);
    return;
  }


  function addMenuitem(aNode, aIndex) {
    var mi = aNode.appendChild(document.createElement("menuitem"));
    mi.id = aIndex ? "context-inspector-" + aIndex : "context-inspector";
    mi.setAttribute("label", aNode.id == "contentAreaContextMenu"
      ? "Inspect Element"
      : "Inspect Chrome Element");
    mi.setAttribute("oncommand",
      "inspectDOMDocument(document.popupNode)");
    mi.setAttribute("onclick",
      "if(event.button == 1) inspectObject(document.popupNode)");
    if(aNode.id != "chrome-inspector-popup") {
      var ms = aNode.insertBefore(document.createElement("menuseparator"), mi);
      ms.id = mi.id + "-separator";
    }
  }


  var popups = document.getElementsByTagName("popup");
  for(var i = 0; i < popups.length; i++) {
    var popup = popups[i];
    if(popup.getElementsByTagName("menuitem").length)
      addMenuitem(popup, i);
  }


  var newPopup = document.createElement("popup");
  newPopup.id = "chrome-inspector-popup";
  addMenuitem(newPopup);
  document.getElementById("mainPopupSet").appendChild(newPopup);
  document.documentElement.setAttribute("context", newPopup.id);




  //tab context menu
  var tabContext = document.getAnonymousElementByAttribute(
                    gBrowser, "anonid", "tabContextMenu");
  var tabInspector = tabContext.appendChild(
                      document.createElement("menuitem"));
  tabInspector.id = "tab-inspector";
  tabInspector.setAttribute("label", "Inspect This Tab");
  tabInspector.setAttribute("oncommand",
    "var tabbrowser = getBrowser(); " + //thanks, zeniko
    "inspectDOMDocument(tabbrowser.mContextTab.localName == 'tabs'" +
    " ? gBrowser" +
    " : tabbrowser.mContextTab.linkedBrowser.contentDocument);");
  tabInspector.setAttribute("onclick",
    "if(event.button == 1) { " +
    "var tabbrowser = getBrowser(); " +
    "inspectObject(tabbrowser.mContextTab.localName == 'tabs'" +
    " ? gBrowser" +
    " : tabbrowser.mContextTab.linkedBrowser.contentDocument); " +
    "}");


  var tabInspectSeparator = document.createElement("menuseparator");
  tabInspectSeparator.id = "tab-inspector-separator";
  tabContext.insertBefore(tabInspectSeparator, tabInspector);




  //bookmarks context menu
  var bmContext = document.getElementById("bookmarks-context-menu");
  bmContext.addEventListener("popupshowing", function(e) {
    var popup = e.target;
    var bmInspector = document.createElement("menuitem");
    bmInspector.setAttribute("label", "Inspect Bookmark");
    bmInspector.setAttribute("oncommand",
      "inspectDOMDocument(document.popupNode)");
    var bmInspectSeparator = document.createElement("menuseparator");
    bmInspectSeparator.id = "bookmark-inspector-separator";
    popup.insertBefore(bmInspectSeparator, bmContext.lastChild);
    popup.insertBefore(bmInspector, bmInspectSeparator);
    //popup.appendChild(bmInspectSeparator);
    //popup.appendChild(bmInspector);
  }, false);


})();