--- a/toolkit/components/extensions/Extension.jsm
+++ b/toolkit/components/extensions/Extension.jsm
@@ -84,16 +84,18 @@ var {
   EventEmitter,
   LocaleData,
   Messenger,
   injectAPI,
   instanceOf,
   flushJarCache,
 } = ExtensionUtils;
 
+XPCOMUtils.defineLazyGetter(this, "console", ExtensionUtils.getConsole);
+
 const LOGGER_ID_BASE = "addons.webextension.";
 const UUID_MAP_PREF = "extensions.webextensions.uuids";
 const LEAVE_STORAGE_PREF = "extensions.webextensions.keepStorageOnUninstall";
 const LEAVE_UUID_PREF = "extensions.webextensions.keepUuidOnUninstall";
 
 const COMMENT_REGEXP = new RegExp(String.raw`
     ^
     (
@@ -134,16 +136,17 @@ var Management = {
       for (let url of schemaURLs) {
         promises.push(Schemas.load(url));
       }
       return Promise.all(promises);
     });
 
     for (let [/* name */, value] of XPCOMUtils.enumerateCategoryEntries(CATEGORY_EXTENSION_SCRIPTS)) {
       let scope = {
+        get console() { return console; },
         ExtensionContext,
         extensions: this,
         global: scriptScope,
         GlobalManager,
         require,
       };
       Services.scriptloader.loadSubScript(value, scope, "UTF-8");
 

--- a/toolkit/components/extensions/ExtensionContent.jsm
+++ b/toolkit/components/extensions/ExtensionContent.jsm
@@ -50,16 +50,18 @@ var {
   Messenger,
   injectAPI,
   flushJarCache,
   detectLanguage,
   promiseDocumentReady,
   ChildAPIManager,
 } = ExtensionUtils;
 
+XPCOMUtils.defineLazyGetter(this, "console", ExtensionUtils.getConsole);
+
 function isWhenBeforeOrSame(when1, when2) {
   let table = {"document_start": 0,
                "document_end": 1,
                "document_idle": 2};
   return table[when1] <= table[when2];
 }
 
 function getInnerWindowID(window) {

--- a/toolkit/components/extensions/ExtensionManagement.jsm
+++ b/toolkit/components/extensions/ExtensionManagement.jsm
@@ -6,19 +6,24 @@
 
 this.EXPORTED_SYMBOLS = ["ExtensionManagement"];
 
 const Ci = Components.interfaces;
 const Cc = Components.classes;
 const Cu = Components.utils;
 const Cr = Components.results;
 
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/AppConstants.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/AppConstants.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "ExtensionUtils",
+                                  "resource://gre/modules/ExtensionUtils.jsm");
+
+XPCOMUtils.defineLazyGetter(this, "console", () => ExtensionUtils.getConsole());
 
 /*
  * This file should be kept short and simple since it's loaded even
  * when no extensions are running.
  */
 
 // Keep track of frame IDs for content windows. Mostly we can just use
 // the outer window ID as the frame ID. However, the API specifies

--- a/toolkit/components/extensions/ExtensionUtils.jsm
+++ b/toolkit/components/extensions/ExtensionUtils.jsm
@@ -8,34 +8,45 @@ this.EXPORTED_SYMBOLS = ["ExtensionUtils
 
 const Ci = Components.interfaces;
 const Cc = Components.classes;
 const Cu = Components.utils;
 const Cr = Components.results;
 
 const INTEGER = /^[1-9]\d*$/;
 
+Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-Cu.import("resource://gre/modules/Services.jsm");
 
 XPCOMUtils.defineLazyModuleGetter(this, "AddonManager",
                                   "resource://gre/modules/AddonManager.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "AppConstants",
                                   "resource://gre/modules/AppConstants.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "ConsoleAPI",
+                                  "resource://gre/modules/Console.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "LanguageDetector",
                                   "resource:///modules/translation/LanguageDetector.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "Locale",
                                   "resource://gre/modules/Locale.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "MessageChannel",
                                   "resource://gre/modules/MessageChannel.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "Preferences",
                                   "resource://gre/modules/Preferences.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "PromiseUtils",
                                   "resource://gre/modules/PromiseUtils.jsm");
 
+function getConsole() {
+  return new ConsoleAPI({
+    maxLogLevelPref: "extensions.webextensions.log.level",
+    prefix: "WebExtensions",
+  });
+}
+
+XPCOMUtils.defineLazyGetter(this, "console", getConsole);
+
 function filterStack(error) {
   return String(error.stack).replace(/(^.*(Task\.jsm|Promise-backend\.js).*\n)+/gm, "<Promise Chain>\n");
 }
 
 // Run a function and report exceptions.
 function runSafeSyncWithoutClone(f, ...args) {
   try {
     return f(...args);
@@ -1509,16 +1520,17 @@ function normalizeTime(date) {
   return new Date((typeof date == "string" && /^\d+$/.test(date))
                         ? parseInt(date, 10) : date);
 }
 
 this.ExtensionUtils = {
   detectLanguage,
   extend,
   flushJarCache,
+  getConsole,
   ignoreEvent,
   injectAPI,
   instanceOf,
   normalizeTime,
   promiseDocumentLoaded,
   promiseDocumentReady,
   promiseObserved,
   runSafe,