:-moz-any(bla,bla-bla):before {
    content: '' !important;
    display: block !important;
    visibility: visible !important;
    position: absolute !important;
    top: 0!important;
    left: 0!important;
    width: 100%!important;
    height: 100%!important;
    background: none!important;
    outline: 2px dashed red !important;
    outline-offset: -2px!important;
    z-index: 2147483647!important;
    pointer-events: none!important;
  }

var Cc = Components.classes;
var Ci = Components.interfaces;

function getFile() {
  var nsIFilePicker = Ci.nsIFilePicker;
  var fp = Cc['@mozilla.org/filepicker;1'].
           createInstance(nsIFilePicker);
  fp.init(window, gNavigatorBundle.getString("openFile"),
                   nsIFilePicker.modeOpen);
  fp.appendFilters(nsIFilePicker.filterImages |
                   nsIFilePicker.filterAll);
  if (fp.show() == nsIFilePicker.returnCancel) return;

  var localFile = Cc["@mozilla.org/file/local;1"]
                      .createInstance(Ci.nsILocalFile);
  localFile.initWithPath(fp.file.path);
  return localFile;
}

function generateDataURI(aFile) {
  var contentType = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService)
                                             .getTypeFromFile(aFile);
  var inputStream = Cc["@mozilla.org/network/file-input-stream;1"]
                      .createInstance(Ci.nsIFileInputStream);
  inputStream.init(aFile, 0x01, 0600, 0);
  var stream = Cc["@mozilla.org/binaryinputstream;1"]
                 .createInstance(Ci.nsIBinaryInputStream);
  stream.setInputStream(inputStream);
  var encoded = btoa(stream.readBytes(stream.available()));
  return "data:" + contentType + ";base64," + encoded;
}

this.onclick = function(e) {
  if (e.button == 0) {
    var file = getFile();
    if (!file) return;
    var dataURI = generateDataURI(file);
    var tab = gBrowser.loadOneTab("https://www.google.com/imghp?sbi=1", null, null, null, false);
    tab.addEventListener("load", function(){
      content.document.forms[1].elements[0].value=dataURI;
      content.document.querySelector('#qbbtc .gbqfb').click();
      tab.removeEventListener("load", arguments.callee, false);
    }, false)
  }
}

this._handleClick =()=> menuPopup.showPopup(this, -1, -1, "popup", "bottomleft", "topleft");

var menuPopup = self.appendChild(document.createElement("menupopup"));
var Cc = Components.classes;
var Ci = Components.interfaces;

function getFile() {
  var nsIFilePicker = Ci.nsIFilePicker;
  var fp = Cc['@mozilla.org/filepicker;1'].
           createInstance(nsIFilePicker);
  fp.init(window, gNavigatorBundle.getString("openFile"),
                   nsIFilePicker.modeOpen);
  fp.appendFilters(nsIFilePicker.filterImages |
                   nsIFilePicker.filterAll);
  if (fp.show() == nsIFilePicker.returnCancel) return;

  var localFile = Cc["@mozilla.org/file/local;1"]
                      .createInstance(Ci.nsILocalFile);
  localFile.initWithPath(fp.file.path);
  return localFile;
};

function generateDataURI(aFile) {
  var contentType = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService)
                                             .getTypeFromFile(aFile);
  var inputStream = Cc["@mozilla.org/network/file-input-stream;1"]
                      .createInstance(Ci.nsIFileInputStream);
  inputStream.init(aFile, 0x01, 0600, 0);
  var stream = Cc["@mozilla.org/binaryinputstream;1"]
                 .createInstance(Ci.nsIBinaryInputStream);
  stream.setInputStream(inputStream);
  var encoded = btoa(stream.readBytes(stream.available()));
  return "data:" + contentType + ";base64," + encoded;
};

this.searchInGoogle = function() {
  var file = getFile();
  if (!file) return;
  var dataURI = generateDataURI(file);
  var tab = gBrowser.loadOneTab("https://www.google.com/imghp?sbi=1", null, null, null, false);
  tab.addEventListener("load", function(){
    content.document.forms[1].elements[0].value = dataURI;
    content.document.forms[1].elements[1].click();
    tab.removeEventListener("load", arguments.callee, false);
  }, false)
};

this.searchInYandex = function() {
  var file = getFile();
  if (!file) return;
  var dataURI = generateDataURI(file);
  var tab = gBrowser.loadOneTab("https://yandex.ru/images/", null, null, null, false);
  tab.addEventListener("load", function(){
    content.document.forms[4].elements[0].value = dataURI;
    content.document.forms[4].elements[1].click();
    tab.removeEventListener("load", arguments.callee, false);
  }, false)
};

this.searchInTineye = function() {
  var file = getFile();
  if (!file) return;
  var dataURI = generateDataURI(file);
  var tab = gBrowser.loadOneTab("https://tineye.com/search/", null, null, null, false);
  tab.addEventListener("load", function(){
    content.document.forms[1].elements[0].value = dataURI;
    content.document.forms[1].elements[1].click();
    tab.removeEventListener("load", arguments.callee, false);
  }, false)
};

[
  {label: "Искать картинку в Гугл", func: "searchInGoogle();"},
  {label: "Искать картинку в Яндекс", func: "searchInYandex();"},
  {label: "Искать картинку в Tineye", func: "searchInTineye();"}
].forEach(function(m) {
  var mItem = document.createElement("menuitem");

  mItem.setAttribute("label", m.label);
  mItem.setAttribute("oncommand", "document.getElementById('" + self.id + "')." + m.func + "");

  menuPopup.appendChild(mItem);

});
addDestructor(function() {menuPopup.parentNode.removeChild(menuPopup)});