fixup! Bug 8324: Prevent DNS proxy bypasses caused by Drag&Drop

 * access to URLs (a potential proxy bypass vector).

 *************************************************************************/

import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";

const lazy = {};

XPCOMUtils.defineLazyGetter(lazy, "logger", () => {

ChromeUtils.defineLazyGetter(lazy, "logger", () => {

  // Keep the logger lazy, because it is used only in the parent process.

  // For some reason, Mozilla considers reading the preference linked to the

  // level in the children illegal (and triggers a crash when

  // fission.enforceBlocklistedPrefsInSubprocesses is true).

  // (Or maybe this crash used to happen when the logger was not lazy, and maybe

  // the preferences were not ready, yet?)

  const { ConsoleAPI } = ChromeUtils.importESModule(

    "resource://gre/modules/Console.sys.mjs"

  );

  return new ConsoleAPI({

    maxLogLevel: "warn",

  return new console.createInstance({

    maxLogLevel: "Warn",

    maxLogLevelPref: "browser.dragdropfilter.log_level",

    prefix: "DragDropFilter",

  });

    }

  },

  observe(subject, topic, data) {

  observe(subject, topic) {

    if (topic === "on-datatransfer-available") {

      lazy.logger.debug("The DataTransfer is available");

      this.filterDataTransferURLs(subject);