Add m-esr52 at 52.6.0

1 files changed, 1459 insertions, 0 deletions

diff --git a/toolkit/components/telemetry/TelemetryEnvironment.jsm b/toolkit/components/telemetry/TelemetryEnvironment.jsm
new file mode 100644
index 000000000..e2453649c
--- /dev/null
+++ b/toolkit/components/telemetry/TelemetryEnvironment.jsm
@@ -0,0 +1,1459 @@
+/* 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";
+
+this.EXPORTED_SYMBOLS = [
+  "TelemetryEnvironment",
+];
+
+const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
+const myScope = this;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm", this);
+Cu.import("resource://gre/modules/Task.jsm");
+Cu.import("resource://gre/modules/Log.jsm");
+Cu.import("resource://gre/modules/Preferences.jsm");
+Cu.import("resource://gre/modules/PromiseUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/TelemetryUtils.jsm", this);
+Cu.import("resource://gre/modules/ObjectUtils.jsm");
+Cu.import("resource://gre/modules/TelemetryController.jsm", this);
+Cu.import("resource://gre/modules/AppConstants.jsm");
+
+const Utils = TelemetryUtils;
+
+XPCOMUtils.defineLazyModuleGetter(this, "AttributionCode",
+                                  "resource:///modules/AttributionCode.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "ctypes",
+                                  "resource://gre/modules/ctypes.jsm");
+if (AppConstants.platform !== "gonk") {
+  Cu.import("resource://gre/modules/AddonManager.jsm");
+  XPCOMUtils.defineLazyModuleGetter(this, "LightweightThemeManager",
+                                    "resource://gre/modules/LightweightThemeManager.jsm");
+}
+XPCOMUtils.defineLazyModuleGetter(this, "ProfileAge",
+                                  "resource://gre/modules/ProfileAge.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "UpdateUtils",
+                                  "resource://gre/modules/UpdateUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "WindowsRegistry",
+                                  "resource://gre/modules/WindowsRegistry.jsm");
+
+// The maximum length of a string (e.g. description) in the addons section.
+const MAX_ADDON_STRING_LENGTH = 100;
+// The maximum length of a string value in the settings.attribution object.
+const MAX_ATTRIBUTION_STRING_LENGTH = 100;
+
+/**
+ * This is a policy object used to override behavior for testing.
+ */
+var Policy = {
+  now: () => new Date(),
+};
+
+var gGlobalEnvironment;
+function getGlobal() {
+  if (!gGlobalEnvironment) {
+    gGlobalEnvironment = new EnvironmentCache();
+  }
+  return gGlobalEnvironment;
+}
+
+this.TelemetryEnvironment = {
+  get currentEnvironment() {
+    return getGlobal().currentEnvironment;
+  },
+
+  onInitialized: function() {
+    return getGlobal().onInitialized();
+  },
+
+  delayedInit: function() {
+    return getGlobal().delayedInit();
+  },
+
+  registerChangeListener: function(name, listener) {
+    return getGlobal().registerChangeListener(name, listener);
+  },
+
+  unregisterChangeListener: function(name) {
+    return getGlobal().unregisterChangeListener(name);
+  },
+
+  shutdown: function() {
+    return getGlobal().shutdown();
+  },
+
+  // Policy to use when saving preferences. Exported for using them in tests.
+  RECORD_PREF_STATE: 1, // Don't record the preference value
+  RECORD_PREF_VALUE: 2, // We only record user-set prefs.
+
+  // Testing method
+  testWatchPreferences: function(prefMap) {
+    return getGlobal()._watchPreferences(prefMap);
+  },
+
+  /**
+   * Intended for use in tests only.
+   *
+   * In multiple tests we need a way to shut and re-start telemetry together
+   * with TelemetryEnvironment. This is problematic due to the fact that
+   * TelemetryEnvironment is a singleton. We, therefore, need this helper
+   * method to be able to re-set TelemetryEnvironment.
+   */
+  testReset: function() {
+    return getGlobal().reset();
+  },
+
+  /**
+   * Intended for use in tests only.
+   */
+  testCleanRestart: function() {
+    getGlobal().shutdown();
+    gGlobalEnvironment = null;
+    return getGlobal();
+  },
+};
+
+const RECORD_PREF_STATE = TelemetryEnvironment.RECORD_PREF_STATE;
+const RECORD_PREF_VALUE = TelemetryEnvironment.RECORD_PREF_VALUE;
+const DEFAULT_ENVIRONMENT_PREFS = new Map([
+  ["app.feedback.baseURL", {what: RECORD_PREF_VALUE}],
+  ["app.support.baseURL", {what: RECORD_PREF_VALUE}],
+  ["accessibility.browsewithcaret", {what: RECORD_PREF_VALUE}],
+  ["accessibility.force_disabled", {what:  RECORD_PREF_VALUE}],
+  ["app.update.auto", {what: RECORD_PREF_VALUE}],
+  ["app.update.enabled", {what: RECORD_PREF_VALUE}],
+  ["app.update.interval", {what: RECORD_PREF_VALUE}],
+  ["app.update.service.enabled", {what: RECORD_PREF_VALUE}],
+  ["app.update.silent", {what: RECORD_PREF_VALUE}],
+  ["app.update.url", {what: RECORD_PREF_VALUE}],
+  ["browser.cache.disk.enable", {what: RECORD_PREF_VALUE}],
+  ["browser.cache.disk.capacity", {what: RECORD_PREF_VALUE}],
+  ["browser.cache.memory.enable", {what: RECORD_PREF_VALUE}],
+  ["browser.cache.offline.enable", {what: RECORD_PREF_VALUE}],
+  ["browser.formfill.enable", {what: RECORD_PREF_VALUE}],
+  ["browser.newtab.url", {what: RECORD_PREF_STATE}],
+  ["browser.newtabpage.enabled", {what: RECORD_PREF_VALUE}],
+  ["browser.newtabpage.enhanced", {what: RECORD_PREF_VALUE}],
+  ["browser.shell.checkDefaultBrowser", {what: RECORD_PREF_VALUE}],
+  ["browser.search.suggest.enabled", {what: RECORD_PREF_VALUE}],
+  ["browser.startup.homepage", {what: RECORD_PREF_STATE}],
+  ["browser.startup.page", {what: RECORD_PREF_VALUE}],
+  ["browser.tabs.animate", {what: RECORD_PREF_VALUE}],
+  ["browser.urlbar.suggest.searches", {what: RECORD_PREF_VALUE}],
+  ["browser.urlbar.userMadeSearchSuggestionsChoice", {what: RECORD_PREF_VALUE}],
+  // Record "Zoom Text Only" pref in Firefox 50 to 52 (Bug 979323).
+  ["browser.zoom.full", {what: RECORD_PREF_VALUE}],
+  ["devtools.chrome.enabled", {what: RECORD_PREF_VALUE}],
+  ["devtools.debugger.enabled", {what: RECORD_PREF_VALUE}],
+  ["devtools.debugger.remote-enabled", {what: RECORD_PREF_VALUE}],
+  ["dom.ipc.plugins.asyncInit.enabled", {what: RECORD_PREF_VALUE}],
+  ["dom.ipc.plugins.enabled", {what: RECORD_PREF_VALUE}],
+  ["dom.ipc.processCount", {what: RECORD_PREF_VALUE, requiresRestart: true}],
+  ["dom.max_script_run_time", {what: RECORD_PREF_VALUE}],
+  ["experiments.manifest.uri", {what: RECORD_PREF_VALUE}],
+  ["extensions.autoDisableScopes", {what: RECORD_PREF_VALUE}],
+  ["extensions.enabledScopes", {what: RECORD_PREF_VALUE}],
+  ["extensions.blocklist.enabled", {what: RECORD_PREF_VALUE}],
+  ["extensions.blocklist.url", {what: RECORD_PREF_VALUE}],
+  ["extensions.strictCompatibility", {what: RECORD_PREF_VALUE}],
+  ["extensions.update.enabled", {what: RECORD_PREF_VALUE}],
+  ["extensions.update.url", {what: RECORD_PREF_VALUE}],
+  ["extensions.update.background.url", {what: RECORD_PREF_VALUE}],
+  ["general.smoothScroll", {what: RECORD_PREF_VALUE}],
+  ["gfx.direct2d.disabled", {what: RECORD_PREF_VALUE}],
+  ["gfx.direct2d.force-enabled", {what: RECORD_PREF_VALUE}],
+  ["gfx.direct2d.use1_1", {what: RECORD_PREF_VALUE}],
+  ["layers.acceleration.disabled", {what: RECORD_PREF_VALUE}],
+  ["layers.acceleration.force-enabled", {what: RECORD_PREF_VALUE}],
+  ["layers.async-pan-zoom.enabled", {what: RECORD_PREF_VALUE}],
+  ["layers.async-video-oop.enabled", {what: RECORD_PREF_VALUE}],
+  ["layers.async-video.enabled", {what: RECORD_PREF_VALUE}],
+  ["layers.componentalpha.enabled", {what: RECORD_PREF_VALUE}],
+  ["layers.d3d11.disable-warp", {what: RECORD_PREF_VALUE}],
+  ["layers.d3d11.force-warp", {what: RECORD_PREF_VALUE}],
+  ["layers.offmainthreadcomposition.force-disabled", {what: RECORD_PREF_VALUE}],
+  ["layers.prefer-d3d9", {what: RECORD_PREF_VALUE}],
+  ["layers.prefer-opengl", {what: RECORD_PREF_VALUE}],
+  ["layout.css.devPixelsPerPx", {what: RECORD_PREF_VALUE}],
+  ["network.proxy.autoconfig_url", {what: RECORD_PREF_STATE}],
+  ["network.proxy.http", {what: RECORD_PREF_STATE}],
+  ["network.proxy.ssl", {what: RECORD_PREF_STATE}],
+  ["pdfjs.disabled", {what: RECORD_PREF_VALUE}],
+  ["places.history.enabled", {what: RECORD_PREF_VALUE}],
+  ["privacy.trackingprotection.enabled", {what: RECORD_PREF_VALUE}],
+  ["privacy.donottrackheader.enabled", {what: RECORD_PREF_VALUE}],
+  ["services.sync.serverURL", {what: RECORD_PREF_STATE}],
+  ["security.mixed_content.block_active_content", {what: RECORD_PREF_VALUE}],
+  ["security.mixed_content.block_display_content", {what: RECORD_PREF_VALUE}],
+  ["security.sandbox.content.level", {what: RECORD_PREF_VALUE}],
+  ["xpinstall.signatures.required", {what: RECORD_PREF_VALUE}],
+]);
+
+const LOGGER_NAME = "Toolkit.Telemetry";
+
+const PREF_BLOCKLIST_ENABLED = "extensions.blocklist.enabled";
+const PREF_DISTRIBUTION_ID = "distribution.id";
+const PREF_DISTRIBUTION_VERSION = "distribution.version";
+const PREF_DISTRIBUTOR = "app.distributor";
+const PREF_DISTRIBUTOR_CHANNEL = "app.distributor.channel";
+const PREF_HOTFIX_LASTVERSION = "extensions.hotfix.lastVersion";
+const PREF_APP_PARTNER_BRANCH = "app.partner.";
+const PREF_PARTNER_ID = "mozilla.partner.id";
+const PREF_UPDATE_ENABLED = "app.update.enabled";
+const PREF_UPDATE_AUTODOWNLOAD = "app.update.auto";
+const PREF_SEARCH_COHORT = "browser.search.cohort";
+const PREF_E10S_COHORT = "e10s.rollout.cohort";
+
+const COMPOSITOR_CREATED_TOPIC = "compositor:created";
+const DISTRIBUTION_CUSTOMIZATION_COMPLETE_TOPIC = "distribution-customization-complete";
+const EXPERIMENTS_CHANGED_TOPIC = "experiments-changed";
+const GFX_FEATURES_READY_TOPIC = "gfx-features-ready";
+const SEARCH_ENGINE_MODIFIED_TOPIC = "browser-search-engine-modified";
+const SEARCH_SERVICE_TOPIC = "browser-search-service";
+
+/**
+ * Enforces the parameter to a boolean value.
+ * @param aValue The input value.
+ * @return {Boolean|Object} If aValue is a boolean or a number, returns its truthfulness
+ *         value. Otherwise, return null.
+ */
+function enforceBoolean(aValue) {
+  if (typeof(aValue) !== "number" && typeof(aValue) !== "boolean") {
+    return null;
+  }
+  return (new Boolean(aValue)).valueOf();
+}
+
+/**
+ * Get the current browser.
+ * @return a string with the locale or null on failure.
+ */
+function getBrowserLocale() {
+  try {
+    return Cc["@mozilla.org/chrome/chrome-registry;1"].
+             getService(Ci.nsIXULChromeRegistry).
+             getSelectedLocale('global');
+  } catch (e) {
+    return null;
+  }
+}
+
+/**
+ * Get the current OS locale.
+ * @return a string with the OS locale or null on failure.
+ */
+function getSystemLocale() {
+  try {
+    return Services.locale.getLocaleComponentForUserAgent();
+  } catch (e) {
+    return null;
+  }
+}
+
+/**
+ * Asynchronously get a list of addons of the specified type from the AddonManager.
+ * @param aTypes An array containing the types of addons to request.
+ * @return Promise<Array> resolved when AddonManager has finished, returning an
+ *         array of addons.
+ */
+function promiseGetAddonsByTypes(aTypes) {
+  return new Promise((resolve) =>
+                     AddonManager.getAddonsByTypes(aTypes, (addons) => resolve(addons)));
+}
+
+/**
+ * Safely get a sysinfo property and return its value. If the property is not
+ * available, return aDefault.
+ *
+ * @param aPropertyName the property name to get.
+ * @param aDefault the value to return if aPropertyName is not available.
+ * @return The property value, if available, or aDefault.
+ */
+function getSysinfoProperty(aPropertyName, aDefault) {
+  try {
+    // |getProperty| may throw if |aPropertyName| does not exist.
+    return Services.sysinfo.getProperty(aPropertyName);
+  } catch (e) {}
+
+  return aDefault;
+}
+
+/**
+ * Safely get a gfxInfo field and return its value. If the field is not available, return
+ * aDefault.
+ *
+ * @param aPropertyName the property name to get.
+ * @param aDefault the value to return if aPropertyName is not available.
+ * @return The property value, if available, or aDefault.
+ */
+function getGfxField(aPropertyName, aDefault) {
+  let gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(Ci.nsIGfxInfo);
+
+  try {
+    // Accessing the field may throw if |aPropertyName| does not exist.
+    let gfxProp = gfxInfo[aPropertyName];
+    if (gfxProp !== undefined && gfxProp !== "") {
+      return gfxProp;
+    }
+  } catch (e) {}
+
+  return aDefault;
+}
+
+/**
+ * Returns a substring of the input string.
+ *
+ * @param {String} aString The input string.
+ * @param {Integer} aMaxLength The maximum length of the returned substring. If this is
+ *        greater than the length of the input string, we return the whole input string.
+ * @return {String} The substring or null if the input string is null.
+ */
+function limitStringToLength(aString, aMaxLength) {
+  if (typeof(aString) !== "string") {
+    return null;
+  }
+  return aString.substring(0, aMaxLength);
+}
+
+/**
+ * Force a value to be a string.
+ * Only if the value is null, null is returned instead.
+ */
+function forceToStringOrNull(aValue) {
+  if (aValue === null) {
+    return null;
+  }
+
+  return String(aValue);
+}
+
+/**
+ * Get the information about a graphic adapter.
+ *
+ * @param aSuffix A suffix to add to the properties names.
+ * @return An object containing the adapter properties.
+ */
+function getGfxAdapter(aSuffix = "") {
+  // Note that gfxInfo, and so getGfxField, might return "Unknown" for the RAM on failures,
+  // not null.
+  let memoryMB = parseInt(getGfxField("adapterRAM" + aSuffix, null), 10);
+  if (Number.isNaN(memoryMB)) {
+    memoryMB = null;
+  }
+
+  return {
+    description: getGfxField("adapterDescription" + aSuffix, null),
+    vendorID: getGfxField("adapterVendorID" + aSuffix, null),
+    deviceID: getGfxField("adapterDeviceID" + aSuffix, null),
+    subsysID: getGfxField("adapterSubsysID" + aSuffix, null),
+    RAM: memoryMB,
+    driver: getGfxField("adapterDriver" + aSuffix, null),
+    driverVersion: getGfxField("adapterDriverVersion" + aSuffix, null),
+    driverDate: getGfxField("adapterDriverDate" + aSuffix, null),
+  };
+}
+
+/**
+ * Gets the service pack and build information on Windows platforms. The initial version
+ * was copied from nsUpdateService.js.
+ *
+ * @return An object containing the service pack major and minor versions, along with the
+ *         build number.
+ */
+function getWindowsVersionInfo() {
+  const UNKNOWN_VERSION_INFO = {servicePackMajor: null, servicePackMinor: null, buildNumber: null};
+
+  if (AppConstants.platform !== "win") {
+    return UNKNOWN_VERSION_INFO;
+  }
+
+  const BYTE = ctypes.uint8_t;
+  const WORD = ctypes.uint16_t;
+  const DWORD = ctypes.uint32_t;
+  const WCHAR = ctypes.char16_t;
+  const BOOL = ctypes.int;
+
+  // This structure is described at:
+  // http://msdn.microsoft.com/en-us/library/ms724833%28v=vs.85%29.aspx
+  const SZCSDVERSIONLENGTH = 128;
+  const OSVERSIONINFOEXW = new ctypes.StructType('OSVERSIONINFOEXW',
+      [
+      {dwOSVersionInfoSize: DWORD},
+      {dwMajorVersion: DWORD},
+      {dwMinorVersion: DWORD},
+      {dwBuildNumber: DWORD},
+      {dwPlatformId: DWORD},
+      {szCSDVersion: ctypes.ArrayType(WCHAR, SZCSDVERSIONLENGTH)},
+      {wServicePackMajor: WORD},
+      {wServicePackMinor: WORD},
+      {wSuiteMask: WORD},
+      {wProductType: BYTE},
+      {wReserved: BYTE}
+      ]);
+
+  let kernel32 = ctypes.open("kernel32");
+  try {
+    let GetVersionEx = kernel32.declare("GetVersionExW",
+                                        ctypes.default_abi,
+                                        BOOL,
+                                        OSVERSIONINFOEXW.ptr);
+    let winVer = OSVERSIONINFOEXW();
+    winVer.dwOSVersionInfoSize = OSVERSIONINFOEXW.size;
+
+    if (0 === GetVersionEx(winVer.address())) {
+      throw ("Failure in GetVersionEx (returned 0)");
+    }
+
+    return {
+      servicePackMajor: winVer.wServicePackMajor,
+      servicePackMinor: winVer.wServicePackMinor,
+      buildNumber: winVer.dwBuildNumber,
+    };
+  } catch (e) {
+    return UNKNOWN_VERSION_INFO;
+  } finally {
+    kernel32.close();
+  }
+}
+
+/**
+ * Encapsulates the asynchronous magic interfacing with the addon manager. The builder
+ * is owned by a parent environment object and is an addon listener.
+ */
+function EnvironmentAddonBuilder(environment) {
+  this._environment = environment;
+
+  // The pending task blocks addon manager shutdown. It can either be the initial load
+  // or a change load.
+  this._pendingTask = null;
+
+  // Set to true once initial load is complete and we're watching for changes.
+  this._loaded = false;
+}
+EnvironmentAddonBuilder.prototype = {
+  /**
+   * Get the initial set of addons.
+   * @returns Promise<void> when the initial load is complete.
+   */
+  init: function() {
+    // Some tests don't initialize the addon manager. This accounts for the
+    // unfortunate reality of life.
+    try {
+      AddonManager.shutdown.addBlocker("EnvironmentAddonBuilder",
+        () => this._shutdownBlocker());
+    } catch (err) {
+      return Promise.reject(err);
+    }
+
+    this._pendingTask = this._updateAddons().then(
+      () => { this._pendingTask = null; },
+      (err) => {
+        this._environment._log.error("init - Exception in _updateAddons", err);
+        this._pendingTask = null;
+      }
+    );
+
+    return this._pendingTask;
+  },
+
+  /**
+   * Register an addon listener and watch for changes.
+   */
+  watchForChanges: function() {
+    this._loaded = true;
+    AddonManager.addAddonListener(this);
+    Services.obs.addObserver(this, EXPERIMENTS_CHANGED_TOPIC, false);
+  },
+
+  // AddonListener
+  onEnabled: function() {
+    this._onAddonChange();
+  },
+  onDisabled: function() {
+    this._onAddonChange();
+  },
+  onInstalled: function() {
+    this._onAddonChange();
+  },
+  onUninstalling: function() {
+    this._onAddonChange();
+  },
+
+  _onAddonChange: function() {
+    this._environment._log.trace("_onAddonChange");
+    this._checkForChanges("addons-changed");
+  },
+
+  // nsIObserver
+  observe: function (aSubject, aTopic, aData) {
+    this._environment._log.trace("observe - Topic " + aTopic);
+    this._checkForChanges("experiment-changed");
+  },
+
+  _checkForChanges: function(changeReason) {
+    if (this._pendingTask) {
+      this._environment._log.trace("_checkForChanges - task already pending, dropping change with reason " + changeReason);
+      return;
+    }
+
+    this._pendingTask = this._updateAddons().then(
+      (result) => {
+        this._pendingTask = null;
+        if (result.changed) {
+          this._environment._onEnvironmentChange(changeReason, result.oldEnvironment);
+        }
+      },
+      (err) => {
+        this._pendingTask = null;
+        this._environment._log.error("_checkForChanges: Error collecting addons", err);
+      });
+  },
+
+  _shutdownBlocker: function() {
+    if (this._loaded) {
+      AddonManager.removeAddonListener(this);
+      Services.obs.removeObserver(this, EXPERIMENTS_CHANGED_TOPIC);
+    }
+    return this._pendingTask;
+  },
+
+  /**
+   * Collect the addon data for the environment.
+   *
+   * This should only be called from _pendingTask; otherwise we risk
+   * running this during addon manager shutdown.
+   *
+   * @returns Promise<Object> This returns a Promise resolved with a status object with the following members:
+   *   changed - Whether the environment changed.
+   *   oldEnvironment - Only set if a change occured, contains the environment data before the change.
+   */
+  _updateAddons: Task.async(function* () {
+    this._environment._log.trace("_updateAddons");
+    let personaId = null;
+    if (AppConstants.platform !== "gonk") {
+      let theme = LightweightThemeManager.currentTheme;
+      if (theme) {
+        personaId = theme.id;
+      }
+    }
+
+    let addons = {
+      activeAddons: yield this._getActiveAddons(),
+      theme: yield this._getActiveTheme(),
+      activePlugins: this._getActivePlugins(),
+      activeGMPlugins: yield this._getActiveGMPlugins(),
+      activeExperiment: this._getActiveExperiment(),
+      persona: personaId,
+    };
+
+    let result = {
+      changed: !this._environment._currentEnvironment.addons ||
+               !ObjectUtils.deepEqual(addons, this._environment._currentEnvironment.addons),
+    };
+
+    if (result.changed) {
+      this._environment._log.trace("_updateAddons: addons differ");
+      result.oldEnvironment = Cu.cloneInto(this._environment._currentEnvironment, myScope);
+      this._environment._currentEnvironment.addons = addons;
+    }
+
+    return result;
+  }),
+
+  /**
+   * Get the addon data in object form.
+   * @return Promise<object> containing the addon data.
+   */
+  _getActiveAddons: Task.async(function* () {
+    // Request addons, asynchronously.
+    let allAddons = yield promiseGetAddonsByTypes(["extension", "service"]);
+
+    let activeAddons = {};
+    for (let addon of allAddons) {
+      // Skip addons which are not active.
+      if (!addon.isActive) {
+        continue;
+      }
+
+      // Weird addon data in the wild can lead to exceptions while collecting
+      // the data.
+      try {
+        // Make sure to have valid dates.
+        let installDate = new Date(Math.max(0, addon.installDate));
+        let updateDate = new Date(Math.max(0, addon.updateDate));
+
+        activeAddons[addon.id] = {
+          blocklisted: (addon.blocklistState !== Ci.nsIBlocklistService.STATE_NOT_BLOCKED),
+          description: limitStringToLength(addon.description, MAX_ADDON_STRING_LENGTH),
+          name: limitStringToLength(addon.name, MAX_ADDON_STRING_LENGTH),
+          userDisabled: enforceBoolean(addon.userDisabled),
+          appDisabled: addon.appDisabled,
+          version: limitStringToLength(addon.version, MAX_ADDON_STRING_LENGTH),
+          scope: addon.scope,
+          type: addon.type,
+          foreignInstall: enforceBoolean(addon.foreignInstall),
+          hasBinaryComponents: addon.hasBinaryComponents,
+          installDay: Utils.millisecondsToDays(installDate.getTime()),
+          updateDay: Utils.millisecondsToDays(updateDate.getTime()),
+          signedState: addon.signedState,
+          isSystem: addon.isSystem,
+        };
+
+        if (addon.signedState !== undefined)
+          activeAddons[addon.id].signedState = addon.signedState;
+
+      } catch (ex) {
+        this._environment._log.error("_getActiveAddons - An addon was discarded due to an error", ex);
+        continue;
+      }
+    }
+
+    return activeAddons;
+  }),
+
+  /**
+   * Get the currently active theme data in object form.
+   * @return Promise<object> containing the active theme data.
+   */
+  _getActiveTheme: Task.async(function* () {
+    // Request themes, asynchronously.
+    let themes = yield promiseGetAddonsByTypes(["theme"]);
+
+    let activeTheme = {};
+    // We only store information about the active theme.
+    let theme = themes.find(theme => theme.isActive);
+    if (theme) {
+      // Make sure to have valid dates.
+      let installDate = new Date(Math.max(0, theme.installDate));
+      let updateDate = new Date(Math.max(0, theme.updateDate));
+
+      activeTheme = {
+        id: theme.id,
+        blocklisted: (theme.blocklistState !== Ci.nsIBlocklistService.STATE_NOT_BLOCKED),
+        description: limitStringToLength(theme.description, MAX_ADDON_STRING_LENGTH),
+        name: limitStringToLength(theme.name, MAX_ADDON_STRING_LENGTH),
+        userDisabled: enforceBoolean(theme.userDisabled),
+        appDisabled: theme.appDisabled,
+        version: limitStringToLength(theme.version, MAX_ADDON_STRING_LENGTH),
+        scope: theme.scope,
+        foreignInstall: enforceBoolean(theme.foreignInstall),
+        hasBinaryComponents: theme.hasBinaryComponents,
+        installDay: Utils.millisecondsToDays(installDate.getTime()),
+        updateDay: Utils.millisecondsToDays(updateDate.getTime()),
+      };
+    }
+
+    return activeTheme;
+  }),
+
+  /**
+   * Get the plugins data in object form.
+   * @return Object containing the plugins data.
+   */
+  _getActivePlugins: function () {
+    let pluginTags =
+      Cc["@mozilla.org/plugin/host;1"].getService(Ci.nsIPluginHost).getPluginTags({});
+
+    let activePlugins = [];
+    for (let tag of pluginTags) {
+      // Skip plugins which are not active.
+      if (tag.disabled) {
+        continue;
+      }
+
+      try {
+        // Make sure to have a valid date.
+        let updateDate = new Date(Math.max(0, tag.lastModifiedTime));
+
+        activePlugins.push({
+          name: limitStringToLength(tag.name, MAX_ADDON_STRING_LENGTH),
+          version: limitStringToLength(tag.version, MAX_ADDON_STRING_LENGTH),
+          description: limitStringToLength(tag.description, MAX_ADDON_STRING_LENGTH),
+          blocklisted: tag.blocklisted,
+          disabled: tag.disabled,
+          clicktoplay: tag.clicktoplay,
+          mimeTypes: tag.getMimeTypes({}),
+          updateDay: Utils.millisecondsToDays(updateDate.getTime()),
+        });
+      } catch (ex) {
+        this._environment._log.error("_getActivePlugins - A plugin was discarded due to an error", ex);
+        continue;
+      }
+    }
+
+    return activePlugins;
+  },
+
+  /**
+   * Get the GMPlugins data in object form.
+   * @return Object containing the GMPlugins data.
+   *
+   * This should only be called from _pendingTask; otherwise we risk
+   * running this during addon manager shutdown.
+   */
+  _getActiveGMPlugins: Task.async(function* () {
+    // Request plugins, asynchronously.
+    let allPlugins = yield promiseGetAddonsByTypes(["plugin"]);
+
+    let activeGMPlugins = {};
+    for (let plugin of allPlugins) {
+      // Only get info for active GMplugins.
+      if (!plugin.isGMPlugin || !plugin.isActive) {
+        continue;
+      }
+
+      try {
+        activeGMPlugins[plugin.id] = {
+          version: plugin.version,
+          userDisabled: enforceBoolean(plugin.userDisabled),
+          applyBackgroundUpdates: plugin.applyBackgroundUpdates,
+        };
+      } catch (ex) {
+        this._environment._log.error("_getActiveGMPlugins - A GMPlugin was discarded due to an error", ex);
+        continue;
+      }
+    }
+
+    return activeGMPlugins;
+  }),
+
+  /**
+   * Get the active experiment data in object form.
+   * @return Object containing the active experiment data.
+   */
+  _getActiveExperiment: function () {
+    let experimentInfo = {};
+    try {
+      let scope = {};
+      Cu.import("resource:///modules/experiments/Experiments.jsm", scope);
+      let experiments = scope.Experiments.instance();
+      let activeExperiment = experiments.getActiveExperimentID();
+      if (activeExperiment) {
+        experimentInfo.id = activeExperiment;
+        experimentInfo.branch = experiments.getActiveExperimentBranch();
+      }
+    } catch (e) {
+      // If this is not Firefox, the import will fail.
+    }
+
+    return experimentInfo;
+  },
+};
+
+function EnvironmentCache() {
+  this._log = Log.repository.getLoggerWithMessagePrefix(
+    LOGGER_NAME, "TelemetryEnvironment::");
+  this._log.trace("constructor");
+
+  this._shutdown = false;
+  this._delayedInitFinished = false;
+
+  // A map of listeners that will be called on environment changes.
+  this._changeListeners = new Map();
+
+  // A map of watched preferences which trigger an Environment change when
+  // modified. Every entry contains a recording policy (RECORD_PREF_*).
+  this._watchedPrefs = DEFAULT_ENVIRONMENT_PREFS;
+
+  this._currentEnvironment = {
+    build: this._getBuild(),
+    partner: this._getPartner(),
+    system: this._getSystem(),
+  };
+
+  this._updateSettings();
+  // Fill in the default search engine, if the search provider is already initialized.
+  this._updateSearchEngine();
+  this._addObservers();
+
+  // Build the remaining asynchronous parts of the environment. Don't register change listeners
+  // until the initial environment has been built.
+
+  let p = [];
+  if (AppConstants.platform === "gonk") {
+    this._addonBuilder = {
+      watchForChanges: function() {}
+    };
+  } else {
+    this._addonBuilder = new EnvironmentAddonBuilder(this);
+    p = [ this._addonBuilder.init() ];
+  }
+
+  this._currentEnvironment.profile = {};
+  p.push(this._updateProfile());
+  if (AppConstants.MOZ_BUILD_APP == "browser") {
+    p.push(this._updateAttribution());
+  }
+
+  let setup = () => {
+    this._initTask = null;
+    this._startWatchingPrefs();
+    this._addonBuilder.watchForChanges();
+    this._updateGraphicsFeatures();
+    return this.currentEnvironment;
+  };
+
+  this._initTask = Promise.all(p)
+    .then(
+      () => setup(),
+      (err) => {
+        // log errors but eat them for consumers
+        this._log.error("EnvironmentCache - error while initializing", err);
+        return setup();
+      });
+}
+EnvironmentCache.prototype = {
+  /**
+   * The current environment data. The returned data is cloned to avoid
+   * unexpected sharing or mutation.
+   * @returns object
+   */
+  get currentEnvironment() {
+    return Cu.cloneInto(this._currentEnvironment, myScope);
+  },
+
+  /**
+   * Wait for the current enviroment to be fully initialized.
+   * @returns Promise<object>
+   */
+  onInitialized: function() {
+    if (this._initTask) {
+      return this._initTask;
+    }
+    return Promise.resolve(this.currentEnvironment);
+  },
+
+  /**
+   * This gets called when the delayed init completes.
+   */
+  delayedInit: function() {
+    this._delayedInitFinished = true;
+  },
+
+  /**
+   * Register a listener for environment changes.
+   * @param name The name of the listener. If a new listener is registered
+   *             with the same name, the old listener will be replaced.
+   * @param listener function(reason, oldEnvironment) - Will receive a reason for
+                     the change and the environment data before the change.
+   */
+  registerChangeListener: function (name, listener) {
+    this._log.trace("registerChangeListener for " + name);
+    if (this._shutdown) {
+      this._log.warn("registerChangeListener - already shutdown");
+      return;
+    }
+    this._changeListeners.set(name, listener);
+  },
+
+  /**
+   * Unregister from listening to environment changes.
+   * It's fine to call this on an unitialized TelemetryEnvironment.
+   * @param name The name of the listener to remove.
+   */
+  unregisterChangeListener: function (name) {
+    this._log.trace("unregisterChangeListener for " + name);
+    if (this._shutdown) {
+      this._log.warn("registerChangeListener - already shutdown");
+      return;
+    }
+    this._changeListeners.delete(name);
+  },
+
+  shutdown: function() {
+    this._log.trace("shutdown");
+    this._shutdown = true;
+  },
+
+  /**
+   * Only used in tests, set the preferences to watch.
+   * @param aPreferences A map of preferences names and their recording policy.
+   */
+  _watchPreferences: function (aPreferences) {
+    this._stopWatchingPrefs();
+    this._watchedPrefs = aPreferences;
+    this._updateSettings();
+    this._startWatchingPrefs();
+  },
+
+  /**
+   * Get an object containing the values for the watched preferences. Depending on the
+   * policy, the value for a preference or whether it was changed by user is reported.
+   *
+   * @return An object containing the preferences values.
+   */
+  _getPrefData: function () {
+    let prefData = {};
+    for (let [pref, policy] of this._watchedPrefs.entries()) {
+      // Only record preferences if they are non-default
+      if (!Preferences.isSet(pref)) {
+        continue;
+      }
+
+      // Check the policy for the preference and decide if we need to store its value
+      // or whether it changed from the default value.
+      let prefValue = undefined;
+      if (policy.what == TelemetryEnvironment.RECORD_PREF_STATE) {
+        prefValue = "<user-set>";
+      } else {
+        prefValue = Preferences.get(pref, null);
+      }
+      prefData[pref] = prefValue;
+    }
+    return prefData;
+  },
+
+  /**
+   * Start watching the preferences.
+   */
+  _startWatchingPrefs: function () {
+    this._log.trace("_startWatchingPrefs - " + this._watchedPrefs);
+
+    for (let [pref, options] of this._watchedPrefs) {
+      if (!("requiresRestart" in options) || !options.requiresRestart) {
+        Preferences.observe(pref, this._onPrefChanged, this);
+      }
+    }
+  },
+
+  _onPrefChanged: function() {
+    this._log.trace("_onPrefChanged");
+    let oldEnvironment = Cu.cloneInto(this._currentEnvironment, myScope);
+    this._updateSettings();
+    this._onEnvironmentChange("pref-changed", oldEnvironment);
+  },
+
+  /**
+   * Do not receive any more change notifications for the preferences.
+   */
+  _stopWatchingPrefs: function () {
+    this._log.trace("_stopWatchingPrefs");
+
+    for (let [pref, options] of this._watchedPrefs) {
+      if (!("requiresRestart" in options) || !options.requiresRestart) {
+        Preferences.ignore(pref, this._onPrefChanged, this);
+      }
+    }
+  },
+
+  _addObservers: function () {
+    // Watch the search engine change and service topics.
+    Services.obs.addObserver(this, COMPOSITOR_CREATED_TOPIC, false);
+    Services.obs.addObserver(this, DISTRIBUTION_CUSTOMIZATION_COMPLETE_TOPIC, false);
+    Services.obs.addObserver(this, GFX_FEATURES_READY_TOPIC, false);
+    Services.obs.addObserver(this, SEARCH_ENGINE_MODIFIED_TOPIC, false);
+    Services.obs.addObserver(this, SEARCH_SERVICE_TOPIC, false);
+  },
+
+  _removeObservers: function () {
+    Services.obs.removeObserver(this, COMPOSITOR_CREATED_TOPIC);
+    try {
+      Services.obs.removeObserver(this, DISTRIBUTION_CUSTOMIZATION_COMPLETE_TOPIC);
+    } catch (ex) {}
+    Services.obs.removeObserver(this, GFX_FEATURES_READY_TOPIC);
+    Services.obs.removeObserver(this, SEARCH_ENGINE_MODIFIED_TOPIC);
+    Services.obs.removeObserver(this, SEARCH_SERVICE_TOPIC);
+  },
+
+  observe: function (aSubject, aTopic, aData) {
+    this._log.trace("observe - aTopic: " + aTopic + ", aData: " + aData);
+    switch (aTopic) {
+      case SEARCH_ENGINE_MODIFIED_TOPIC:
+        if (aData != "engine-current") {
+          return;
+        }
+        // Record the new default search choice and send the change notification.
+        this._onSearchEngineChange();
+        break;
+      case SEARCH_SERVICE_TOPIC:
+        if (aData != "init-complete") {
+          return;
+        }
+        // Now that the search engine init is complete, record the default search choice.
+        this._updateSearchEngine();
+        break;
+      case GFX_FEATURES_READY_TOPIC:
+      case COMPOSITOR_CREATED_TOPIC:
+        // Full graphics information is not available until we have created at
+        // least one off-main-thread-composited window. Thus we wait for the
+        // first compositor to be created and then query nsIGfxInfo again.
+        this._updateGraphicsFeatures();
+        break;
+      case DISTRIBUTION_CUSTOMIZATION_COMPLETE_TOPIC:
+        // Distribution customizations are applied after final-ui-startup. query
+        // partner prefs again when they are ready.
+        this._updatePartner();
+        Services.obs.removeObserver(this, aTopic);
+        break;
+    }
+  },
+
+  /**
+   * Get the default search engine.
+   * @return {String} Returns the search engine identifier, "NONE" if no default search
+   *         engine is defined or "UNDEFINED" if no engine identifier or name can be found.
+   */
+  _getDefaultSearchEngine: function () {
+    let engine;
+    try {
+      engine = Services.search.defaultEngine;
+    } catch (e) {}
+
+    let name;
+    if (!engine) {
+      name = "NONE";
+    } else if (engine.identifier) {
+      name = engine.identifier;
+    } else if (engine.name) {
+      name = "other-" + engine.name;
+    } else {
+      name = "UNDEFINED";
+    }
+
+    return name;
+  },
+
+  /**
+   * Update the default search engine value.
+   */
+  _updateSearchEngine: function () {
+    if (!Services.search) {
+      // Just ignore cases where the search service is not implemented.
+      return;
+    }
+
+    this._log.trace("_updateSearchEngine - isInitialized: " + Services.search.isInitialized);
+    if (!Services.search.isInitialized) {
+      return;
+    }
+
+    // Make sure we have a settings section.
+    this._currentEnvironment.settings = this._currentEnvironment.settings || {};
+    // Update the search engine entry in the current environment.
+    this._currentEnvironment.settings.defaultSearchEngine = this._getDefaultSearchEngine();
+    this._currentEnvironment.settings.defaultSearchEngineData =
+      Services.search.getDefaultEngineInfo();
+
+    // Record the cohort identifier used for search defaults A/B testing.
+    if (Services.prefs.prefHasUserValue(PREF_SEARCH_COHORT))
+      this._currentEnvironment.settings.searchCohort = Services.prefs.getCharPref(PREF_SEARCH_COHORT);
+  },
+
+  /**
+   * Update the default search engine value and trigger the environment change.
+   */
+  _onSearchEngineChange: function () {
+    this._log.trace("_onSearchEngineChange");
+
+    // Finally trigger the environment change notification.
+    let oldEnvironment = Cu.cloneInto(this._currentEnvironment, myScope);
+    this._updateSearchEngine();
+    this._onEnvironmentChange("search-engine-changed", oldEnvironment);
+  },
+
+  /**
+   * Update the graphics features object.
+   */
+  _updateGraphicsFeatures: function () {
+    let gfxData = this._currentEnvironment.system.gfx;
+    try {
+      let gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(Ci.nsIGfxInfo);
+      gfxData.features = gfxInfo.getFeatures();
+    } catch (e) {
+      this._log.error("nsIGfxInfo.getFeatures() caught error", e);
+    }
+  },
+
+  /**
+   * Update the partner prefs.
+   */
+  _updatePartner: function() {
+    this._currentEnvironment.partner = this._getPartner();
+  },
+
+  /**
+   * Get the build data in object form.
+   * @return Object containing the build data.
+   */
+  _getBuild: function () {
+    let buildData = {
+      applicationId: Services.appinfo.ID || null,
+      applicationName: Services.appinfo.name || null,
+      architecture: Services.sysinfo.get("arch"),
+      buildId: Services.appinfo.appBuildID || null,
+      version: Services.appinfo.version || null,
+      vendor: Services.appinfo.vendor || null,
+      platformVersion: Services.appinfo.platformVersion || null,
+      xpcomAbi: Services.appinfo.XPCOMABI,
+      hotfixVersion: Preferences.get(PREF_HOTFIX_LASTVERSION, null),
+    };
+
+    // Add |architecturesInBinary| only for Mac Universal builds.
+    if ("@mozilla.org/xpcom/mac-utils;1" in Cc) {
+      let macUtils = Cc["@mozilla.org/xpcom/mac-utils;1"].getService(Ci.nsIMacUtils);
+      if (macUtils && macUtils.isUniversalBinary) {
+        buildData.architecturesInBinary = macUtils.architecturesInBinary;
+      }
+    }
+
+    return buildData;
+  },
+
+  /**
+   * Determine if we're the default browser.
+   * @returns null on error, true if we are the default browser, or false otherwise.
+   */
+  _isDefaultBrowser: function () {
+    if (AppConstants.platform === "gonk") {
+      return true;
+    }
+
+    if (!("@mozilla.org/browser/shell-service;1" in Cc)) {
+      this._log.info("_isDefaultBrowser - Could not obtain browser shell service");
+      return null;
+    }
+
+    let shellService;
+    try {
+      let scope = {};
+      Cu.import("resource:///modules/ShellService.jsm", scope);
+      shellService = scope.ShellService;
+    } catch (ex) {
+      this._log.error("_isDefaultBrowser - Could not obtain shell service JSM");
+    }
+
+    if (!shellService) {
+      try {
+        shellService = Cc["@mozilla.org/browser/shell-service;1"]
+                         .getService(Ci.nsIShellService);
+      } catch (ex) {
+        this._log.error("_isDefaultBrowser - Could not obtain shell service", ex);
+        return null;
+      }
+    }
+
+    try {
+      // This uses the same set of flags used by the pref pane.
+      return shellService.isDefaultBrowser(false, true) ? true : false;
+    } catch (ex) {
+      this._log.error("_isDefaultBrowser - Could not determine if default browser", ex);
+      return null;
+    }
+  },
+
+  /**
+   * Update the cached settings data.
+   */
+  _updateSettings: function () {
+    let updateChannel = null;
+    try {
+      updateChannel = UpdateUtils.getUpdateChannel(false);
+    } catch (e) {}
+
+    this._currentEnvironment.settings = {
+      blocklistEnabled: Preferences.get(PREF_BLOCKLIST_ENABLED, true),
+      e10sEnabled: Services.appinfo.browserTabsRemoteAutostart,
+      e10sCohort: Preferences.get(PREF_E10S_COHORT, "unknown"),
+      telemetryEnabled: Utils.isTelemetryEnabled,
+      locale: getBrowserLocale(),
+      update: {
+        channel: updateChannel,
+        enabled: Preferences.get(PREF_UPDATE_ENABLED, true),
+        autoDownload: Preferences.get(PREF_UPDATE_AUTODOWNLOAD, true),
+      },
+      userPrefs: this._getPrefData(),
+    };
+
+    if (AppConstants.platform !== "gonk") {
+      this._currentEnvironment.settings.addonCompatibilityCheckEnabled =
+        AddonManager.checkCompatibility;
+    }
+
+    if (AppConstants.platform !== "android") {
+      this._currentEnvironment.settings.isDefaultBrowser =
+        this._isDefaultBrowser();
+    }
+
+    this._updateSearchEngine();
+  },
+
+  /**
+   * Update the cached profile data.
+   * @returns Promise<> resolved when the I/O is complete.
+   */
+  _updateProfile: Task.async(function* () {
+    const logger = Log.repository.getLoggerWithMessagePrefix(LOGGER_NAME, "ProfileAge - ");
+    let profileAccessor = new ProfileAge(null, logger);
+
+    let creationDate = yield profileAccessor.created;
+    let resetDate = yield profileAccessor.reset;
+
+    this._currentEnvironment.profile.creationDate =
+      Utils.millisecondsToDays(creationDate);
+    if (resetDate) {
+      this._currentEnvironment.profile.resetDate =
+        Utils.millisecondsToDays(resetDate);
+    }
+  }),
+
+  /**
+   * Update the cached attribution data object.
+   * @returns Promise<> resolved when the I/O is complete.
+   */
+  _updateAttribution: Task.async(function* () {
+    let data = yield AttributionCode.getAttrDataAsync();
+    if (Object.keys(data).length > 0) {
+      this._currentEnvironment.settings.attribution = {};
+      for (let key in data) {
+        this._currentEnvironment.settings.attribution[key] =
+          limitStringToLength(data[key], MAX_ATTRIBUTION_STRING_LENGTH);
+      }
+    }
+  }),
+
+  /**
+   * Get the partner data in object form.
+   * @return Object containing the partner data.
+   */
+  _getPartner: function () {
+    let partnerData = {
+      distributionId: Preferences.get(PREF_DISTRIBUTION_ID, null),
+      distributionVersion: Preferences.get(PREF_DISTRIBUTION_VERSION, null),
+      partnerId: Preferences.get(PREF_PARTNER_ID, null),
+      distributor: Preferences.get(PREF_DISTRIBUTOR, null),
+      distributorChannel: Preferences.get(PREF_DISTRIBUTOR_CHANNEL, null),
+    };
+
+    // Get the PREF_APP_PARTNER_BRANCH branch and append its children to partner data.
+    let partnerBranch = Services.prefs.getBranch(PREF_APP_PARTNER_BRANCH);
+    partnerData.partnerNames = partnerBranch.getChildList("");
+
+    return partnerData;
+  },
+
+  /**
+   * Get the CPU information.
+   * @return Object containing the CPU information data.
+   */
+  _getCpuData: function () {
+    let cpuData = {
+      count: getSysinfoProperty("cpucount", null),
+      cores: getSysinfoProperty("cpucores", null),
+      vendor: getSysinfoProperty("cpuvendor", null),
+      family: getSysinfoProperty("cpufamily", null),
+      model: getSysinfoProperty("cpumodel", null),
+      stepping: getSysinfoProperty("cpustepping", null),
+      l2cacheKB: getSysinfoProperty("cpucachel2", null),
+      l3cacheKB: getSysinfoProperty("cpucachel3", null),
+      speedMHz: getSysinfoProperty("cpuspeed", null),
+    };
+
+    const CPU_EXTENSIONS = ["hasMMX", "hasSSE", "hasSSE2", "hasSSE3", "hasSSSE3",
+                            "hasSSE4A", "hasSSE4_1", "hasSSE4_2", "hasAVX", "hasAVX2",
+                            "hasEDSP", "hasARMv6", "hasARMv7", "hasNEON"];
+
+    // Enumerate the available CPU extensions.
+    let availableExts = [];
+    for (let ext of CPU_EXTENSIONS) {
+      if (getSysinfoProperty(ext, false)) {
+        availableExts.push(ext);
+      }
+    }
+
+    cpuData.extensions = availableExts;
+
+    return cpuData;
+  },
+
+  /**
+   * Get the device information, if we are on a portable device.
+   * @return Object containing the device information data, or null if
+   * not a portable device.
+   */
+  _getDeviceData: function () {
+    if (!["gonk", "android"].includes(AppConstants.platform)) {
+      return null;
+    }
+
+    return {
+      model: getSysinfoProperty("device", null),
+      manufacturer: getSysinfoProperty("manufacturer", null),
+      hardware: getSysinfoProperty("hardware", null),
+      isTablet: getSysinfoProperty("tablet", null),
+    };
+  },
+
+  /**
+   * Get the OS information.
+   * @return Object containing the OS data.
+   */
+  _getOSData: function () {
+    let data = {
+      name: forceToStringOrNull(getSysinfoProperty("name", null)),
+      version: forceToStringOrNull(getSysinfoProperty("version", null)),
+      locale: forceToStringOrNull(getSystemLocale()),
+    };
+
+    if (["gonk", "android"].includes(AppConstants.platform)) {
+      data.kernelVersion = forceToStringOrNull(getSysinfoProperty("kernel_version", null));
+    } else if (AppConstants.platform === "win") {
+      // The path to the "UBR" key, queried to get additional version details on Windows.
+      const WINDOWS_UBR_KEY_PATH = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion";
+
+      let versionInfo = getWindowsVersionInfo();
+      data.servicePackMajor = versionInfo.servicePackMajor;
+      data.servicePackMinor = versionInfo.servicePackMinor;
+      // We only need the build number and UBR if we're at or above Windows 10.
+      if (typeof(data.version) === 'string' &&
+          Services.vc.compare(data.version, "10") >= 0) {
+        data.windowsBuildNumber = versionInfo.buildNumber;
+        // Query the UBR key and only add it to the environment if it's available.
+        // |readRegKey| doesn't throw, but rather returns 'undefined' on error.
+        let ubr = WindowsRegistry.readRegKey(Ci.nsIWindowsRegKey.ROOT_KEY_LOCAL_MACHINE,
+                                             WINDOWS_UBR_KEY_PATH, "UBR",
+                                             Ci.nsIWindowsRegKey.WOW64_64);
+        data.windowsUBR = (ubr !== undefined) ? ubr : null;
+      }
+      data.installYear = getSysinfoProperty("installYear", null);
+    }
+
+    return data;
+  },
+
+  /**
+   * Get the HDD information.
+   * @return Object containing the HDD data.
+   */
+  _getHDDData: function () {
+    return {
+      profile: { // hdd where the profile folder is located
+        model: getSysinfoProperty("profileHDDModel", null),
+        revision: getSysinfoProperty("profileHDDRevision", null),
+      },
+      binary:  { // hdd where the application binary is located
+        model: getSysinfoProperty("binHDDModel", null),
+        revision: getSysinfoProperty("binHDDRevision", null),
+      },
+      system:  { // hdd where the system files are located
+        model: getSysinfoProperty("winHDDModel", null),
+        revision: getSysinfoProperty("winHDDRevision", null),
+      },
+    };
+  },
+
+  /**
+   * Get the GFX information.
+   * @return Object containing the GFX data.
+   */
+  _getGFXData: function () {
+    let gfxData = {
+      D2DEnabled: getGfxField("D2DEnabled", null),
+      DWriteEnabled: getGfxField("DWriteEnabled", null),
+      ContentBackend: getGfxField("ContentBackend", null),
+      // The following line is disabled due to main thread jank and will be enabled
+      // again as part of bug 1154500.
+      // DWriteVersion: getGfxField("DWriteVersion", null),
+      adapters: [],
+      monitors: [],
+      features: {},
+    };
+
+    if (!["gonk", "android", "linux"].includes(AppConstants.platform)) {
+      let gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(Ci.nsIGfxInfo);
+      try {
+        gfxData.monitors = gfxInfo.getMonitors();
+      } catch (e) {
+        this._log.error("nsIGfxInfo.getMonitors() caught error", e);
+      }
+    }
+
+    try {
+      let gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(Ci.nsIGfxInfo);
+      gfxData.features = gfxInfo.getFeatures();
+    } catch (e) {
+      this._log.error("nsIGfxInfo.getFeatures() caught error", e);
+    }
+
+    // GfxInfo does not yet expose a way to iterate through all the adapters.
+    gfxData.adapters.push(getGfxAdapter(""));
+    gfxData.adapters[0].GPUActive = true;
+
+    // If we have a second adapter add it to the gfxData.adapters section.
+    let hasGPU2 = getGfxField("adapterDeviceID2", null) !== null;
+    if (!hasGPU2) {
+      this._log.trace("_getGFXData - Only one display adapter detected.");
+      return gfxData;
+    }
+
+    this._log.trace("_getGFXData - Two display adapters detected.");
+
+    gfxData.adapters.push(getGfxAdapter("2"));
+    gfxData.adapters[1].GPUActive = getGfxField("isGPU2Active", null);
+
+    return gfxData;
+  },
+
+  /**
+   * Get the system data in object form.
+   * @return Object containing the system data.
+   */
+  _getSystem: function () {
+    let memoryMB = getSysinfoProperty("memsize", null);
+    if (memoryMB) {
+      // Send RAM size in megabytes. Rounding because sysinfo doesn't
+      // always provide RAM in multiples of 1024.
+      memoryMB = Math.round(memoryMB / 1024 / 1024);
+    }
+
+    let virtualMB = getSysinfoProperty("virtualmemsize", null);
+    if (virtualMB) {
+      // Send the total virtual memory size in megabytes. Rounding because
+      // sysinfo doesn't always provide RAM in multiples of 1024.
+      virtualMB = Math.round(virtualMB / 1024 / 1024);
+    }
+
+    let data = {
+      memoryMB: memoryMB,
+      virtualMaxMB: virtualMB,
+      cpu: this._getCpuData(),
+      os: this._getOSData(),
+      hdd: this._getHDDData(),
+      gfx: this._getGFXData(),
+    };
+
+    if (AppConstants.platform === "win") {
+      data.isWow64 = getSysinfoProperty("isWow64", null);
+    } else if (["gonk", "android"].includes(AppConstants.platform)) {
+      data.device = this._getDeviceData();
+    }
+
+    return data;
+  },
+
+  _onEnvironmentChange: function (what, oldEnvironment) {
+    this._log.trace("_onEnvironmentChange for " + what);
+
+    // We are already skipping change events in _checkChanges if there is a pending change task running.
+    if (this._shutdown) {
+      this._log.trace("_onEnvironmentChange - Already shut down.");
+      return;
+    }
+
+    for (let [name, listener] of this._changeListeners) {
+      try {
+        this._log.debug("_onEnvironmentChange - calling " + name);
+        listener(what, oldEnvironment);
+      } catch (e) {
+        this._log.error("_onEnvironmentChange - listener " + name + " caught error", e);
+      }
+    }
+  },
+
+  reset: function () {
+    this._shutdown = false;
+    this._delayedInitFinished = false;
+  }
+};