diff --git a/lib/pixel-perfect-actor.js b/lib/pixel-perfect-actor.js
index 90b34dc..19402a2 100644
--- a/lib/pixel-perfect-actor.js
+++ b/lib/pixel-perfect-actor.js
@@ -10,19 +10,36 @@
 
 const { Cu } = require("chrome");
 
-// Remote Debugging Protocol API
-const { DebuggerServer } = Cu.import("resource://gre/modules/devtools/dbg-server.jsm", {});
-const { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
-const protocol = devtools["require"]("devtools/server/protocol");
-const { method, RetVal, ActorClass, Actor, Arg } = protocol;
+// Add-on SDK
 const Events = require("sdk/event/core");
 const DomEvents = require("sdk/dom/events");
-const { makeInfallible } = devtools["require"]("devtools/toolkit/DevToolsUtils.js");
-
 const { setTimeout, clearTimeout } = require("sdk/timers");
+
+// Platform
 const { Services } = Cu.import("resource://gre/modules/Services.jsm", {});
 const currentBrowserVersion = Services.appinfo.platformVersion;
 
+// DevTools
+// See also: https://bugzilla.mozilla.org/show_bug.cgi?id=912121
+var devtools;
+try {
+  devtools = Cu.import("resource://gre/modules/devtools/shared/Loader.jsm", {}).devtools;
+} catch (err) {
+  devtools = Cu.import("resource://gre/modules/devtools/Loader.jsm", {}).devtools;
+}
+
+var DevToolsUtils;
+try {
+  DevToolsUtils = devtools["require"]("devtools/shared/DevToolsUtils");
+} catch (err) {
+  DevToolsUtils = devtools["require"]("devtools/toolkit/DevToolsUtils");
+}
+
+const { DebuggerServer } = devtools["require"]("devtools/server/main");
+const protocol = devtools["require"]("devtools/server/protocol");
+const { method, RetVal, ActorClass, Actor, Arg } = protocol;
+const makeInfallible = DevToolsUtils.makeInfallible;
+
 // For debugging purposes. Note that the tracing module isn't available
 // on the backend (in case of remote device debugging).
 // const baseUrl = "resource://pixelperfectplugin-at-openhouseconcepts-dot-com/";
diff --git a/lib/pixel-perfect-front.js b/lib/pixel-perfect-front.js
index 8574737..927850c 100644
--- a/lib/pixel-perfect-front.js
+++ b/lib/pixel-perfect-front.js
@@ -11,7 +11,7 @@ const { Trace, TraceError } = require("firebug.sdk/lib/core/trace.js").get(modul
 const { PixelPerfectActor } = require("./pixel-perfect-actor.js");
 const Events = require("sdk/event/core");
 
-const { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
+const { devtools } = require("firebug.sdk/lib/core/devtools.js");
 const { Front, FrontClass } = devtools["require"]("devtools/server/protocol");
 
 /**
diff --git a/lib/pixel-perfect-popup.js b/lib/pixel-perfect-popup.js
index ba35524..8a88c20 100644
--- a/lib/pixel-perfect-popup.js
+++ b/lib/pixel-perfect-popup.js
@@ -27,8 +27,7 @@ const { Win } = require("firebug.sdk/lib/core/window.js");
 const { Http } = require("firebug.sdk/lib/core/http.js");
 
 // DevTools
-const { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
-const { makeInfallible } = devtools["require"]("devtools/toolkit/DevToolsUtils.js");
+const { devtools, makeInfallible } = require("firebug.sdk/lib/core/devtools.js");
 
 // Platform Services
 const ioService = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
diff --git a/lib/pixel-perfect-store.js b/lib/pixel-perfect-store.js
index 596b44f..4f3ee28 100644
--- a/lib/pixel-perfect-store.js
+++ b/lib/pixel-perfect-store.js
@@ -19,8 +19,7 @@ const { setTimeout, clearTimeout } = require("sdk/timers");
 const base64 = require("sdk/base64");
 
 // DevTools
-const { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
-const { makeInfallible } = devtools["require"]("devtools/toolkit/DevToolsUtils.js");
+const { devtools, makeInfallible } = require("firebug.sdk/lib/core/devtools.js");
 
 // File Services
 const { FileUtils } = Cu.import("resource://gre/modules/FileUtils.jsm", {});
diff --git a/lib/start-button.js b/lib/start-button.js
index 9e13899..bc7359f 100644
--- a/lib/start-button.js
+++ b/lib/start-button.js
@@ -27,8 +27,7 @@ const { AREA_PANEL, AREA_NAVBAR } = CustomizableUI;
 const { AddonManager } = Cu.import("resource://gre/modules/AddonManager.jsm", {});
 
 // DevTools
-const { gDevTools } = Cu.import("resource:///modules/devtools/gDevTools.jsm", {});
-const { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
+const { devtools, gDevTools } = require("firebug.sdk/lib/core/devtools.js");
 
 const startButtonId = "pixel-perfect-start-button";
 
diff --git a/lib/style-editor-overlay.js b/lib/style-editor-overlay.js
index b36665a..d04ca16 100644
--- a/lib/style-editor-overlay.js
+++ b/lib/style-editor-overlay.js
@@ -19,8 +19,7 @@ const { ToolbarButton } = require("firebug.sdk/lib/toolbar-button.js");
 const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
 
 // DevTools
-const { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
-const { makeInfallible } = devtools["require"]("devtools/toolkit/DevToolsUtils.js");
+const { devtools, makeInfallible } = require("firebug.sdk/lib/core/devtools.js");
 
 /**
  * @overlay This object represents an overlay for the existing Style Editor