--- a/devtools/client/framework/toolbox.js
+++ b/devtools/client/framework/toolbox.js
@@ -487,17 +487,18 @@ Toolbox.prototype = {
   get ReactDOM() {
     return this.browserRequire("devtools/client/shared/vendor/react-dom");
   },
 
   _pingTelemetry: function () {
     this._telemetry.toolOpened("toolbox");
 
     this._telemetry.logOncePerBrowserVersion(OS_HISTOGRAM, system.getOSCPU());
-    this._telemetry.logOncePerBrowserVersion(OS_IS_64_BITS, system.is64Bit ? 1 : 0);
+    this._telemetry.logOncePerBrowserVersion(OS_IS_64_BITS,
+                                             Services.appinfo.is64Bit ? 1 : 0);
     this._telemetry.logOncePerBrowserVersion(SCREENSIZE_HISTOGRAM, system.getScreenDimensions());
   },
 
   /**
    * Because our panels are lazy loaded this is a good place to watch for
    * "pref-changed" events.
    * @param  {String} event
    *         The event type, "pref-changed".

--- a/devtools/client/netmonitor/har/har-builder.js
+++ b/devtools/client/netmonitor/har/har-builder.js
@@ -1,23 +1,20 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 "use strict";
 
-const { Ci, Cc } = require("chrome");
 const { defer, all } = require("promise");
 const { LocalizationHelper } = require("devtools/client/shared/l10n");
+const Services = require("Services");
+const appInfo = Services.appinfo;
 
 loader.lazyRequireGetter(this, "NetworkHelper", "devtools/shared/webconsole/network-helper");
 
-loader.lazyGetter(this, "appInfo", () => {
-  return Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULAppInfo);
-});
-
 loader.lazyGetter(this, "L10N", () => {
   return new LocalizationHelper("chrome://devtools/locale/har.properties");
 });
 
 const HAR_VERSION = "1.1";
 
 /**
  * This object is responsible for building HAR file. See HAR spec:

--- a/devtools/client/shared/shim/Services.js
+++ b/devtools/client/shared/shim/Services.js
@@ -478,17 +478,33 @@ const Services = {
           return "Linux";
         } else if (os.includes("Windows")) {
           return "WINNT";
         } else if (os.includes("Mac")) {
           return "Darwin";
         }
       }
       return "Unknown";
-    }
+    },
+
+    // It's fine for this to be an approximation.
+    get name() {
+      return window.navigator.userAgent;
+    },
+
+    // It's fine for this to be an approximation.
+    get version() {
+      return window.navigator.appVersion;
+    },
+
+    // This is only used by telemetry, which is disabled for the
+    // content case.  So, being totally wrong is ok.
+    get is64Bit() {
+      return true;
+    },
   },
 };
 
 /**
  * Create a new preference.  This is used during startup (see
  * devtools/client/preferences/devtools.js) to install the
  * default preferences.
  *

--- a/devtools/client/shared/telemetry.js
+++ b/devtools/client/shared/telemetry.js
@@ -51,19 +51,17 @@ this.Telemetry = function () {
   this.logOncePerBrowserVersion = this.logOncePerBrowserVersion.bind(this);
   this.destroy = this.destroy.bind(this);
 
   this._timers = new Map();
 };
 
 module.exports = Telemetry;
 
-var {Cc, Ci, Cu} = require("chrome");
 var Services = require("Services");
-var {XPCOMUtils} = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {});
 
 Telemetry.prototype = {
   _histograms: {
     toolbox: {
       histogram: "DEVTOOLS_TOOLBOX_OPENED_COUNT",
       userHistogram: "DEVTOOLS_TOOLBOX_OPENED_PER_USER_FLAG",
       timerHistogram: "DEVTOOLS_TOOLBOX_TIME_ACTIVE_SECONDS"
     },
@@ -352,17 +350,17 @@ Telemetry.prototype = {
   /**
    * Log info about usage once per browser version. This allows us to discover
    * how many individual users are using our tools for each browser version.
    *
    * @param  {String} perUserHistogram
    *         Histogram in which the data is to be stored.
    */
   logOncePerBrowserVersion: function (perUserHistogram, value) {
-    let currentVersion = appInfo.version;
+    let currentVersion = Services.appinfo.version;
     let latest = Services.prefs.getCharPref(TOOLS_OPENED_PREF);
     let latestObj = JSON.parse(latest);
 
     let lastVersionHistogramUpdated = latestObj[perUserHistogram];
 
     if (typeof lastVersionHistogramUpdated == "undefined" ||
         lastVersionHistogramUpdated !== currentVersion) {
       latestObj[perUserHistogram] = currentVersion;
@@ -373,12 +371,8 @@ Telemetry.prototype = {
   },
 
   destroy: function () {
     for (let histogramId of this._timers.keys()) {
       this.stopTimer(histogramId);
     }
   }
 };
-
-XPCOMUtils.defineLazyGetter(this, "appInfo", function () {
-  return Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULAppInfo);
-});

--- a/devtools/shared/system.js
+++ b/devtools/shared/system.js
@@ -326,15 +326,14 @@ function getSetting(name) {
       handleError: (error) => deferred.reject(error),
     });
   } else {
     deferred.reject(new Error("No settings service"));
   }
   return deferred.promise;
 }
 
-exports.is64Bit = Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULAppInfo).is64Bit;
 exports.getSystemInfo = Task.async(getSystemInfo);
 exports.getAppIniString = getAppIniString;
 exports.getSetting = getSetting;
 exports.getScreenDimensions = getScreenDimensions;
 exports.getOSCPU = getOSCPU;
 exports.constants = AppConstants;