Revert "Remove the Social API"

4 files changed, 1376 insertions, 5 deletions

diff --git a/browser/modules/BrowserUITelemetry.jsm b/browser/modules/BrowserUITelemetry.jsm
index a6a5789f4..392462b45 100644
--- a/browser/modules/BrowserUITelemetry.jsm
+++ b/browser/modules/BrowserUITelemetry.jsm
@@ -694,7 +694,7 @@ this.BrowserUITelemetry = {
     "spell-undo-add-to-dictionary", "openlinkincurrent", "openlinkintab",
     "openlink",
     // "openlinkprivate" intentionally omitted for privacy reasons. See bug 1176391.
-    "bookmarklink", "savelink",
+    "bookmarklink", "sharelink", "savelink",
     "marklinkMenu", "copyemail", "copylink", "media-play", "media-pause",
     "media-mute", "media-unmute", "media-playbackrate",
     "media-playbackrate-050x", "media-playbackrate-100x",
@@ -702,12 +702,12 @@ this.BrowserUITelemetry = {
     "media-showcontrols", "media-hidecontrols",
     "video-fullscreen", "leave-dom-fullscreen",
     "reloadimage", "viewimage", "viewvideo", "copyimage-contents", "copyimage",
-    "copyvideourl", "copyaudiourl", "saveimage", "sendimage",
+    "copyvideourl", "copyaudiourl", "saveimage", "shareimage", "sendimage",
     "setDesktopBackground", "viewimageinfo", "viewimagedesc", "savevideo",
-    "saveaudio", "video-saveimage", "sendvideo", "sendaudio",
-    "ctp-play", "ctp-hide", "savepage", "pocket", "markpageMenu",
+    "sharevideo", "saveaudio", "video-saveimage", "sendvideo", "sendaudio",
+    "ctp-play", "ctp-hide", "sharepage", "savepage", "pocket", "markpageMenu",
     "viewbgimage", "undo", "cut", "copy", "paste", "delete", "selectall",
-    "keywordfield", "searchselect", "frame", "showonlythisframe",
+    "keywordfield", "searchselect", "shareselect", "frame", "showonlythisframe",
     "openframeintab", "openframe", "reloadframe", "bookmarkframe", "saveframe",
     "printframe", "viewframesource", "viewframeinfo",
     "viewpartialsource-selection", "viewpartialsource-mathml",
diff --git a/browser/modules/Social.jsm b/browser/modules/Social.jsm
new file mode 100644
index 000000000..1569e0122
--- /dev/null
+++ b/browser/modules/Social.jsm
@@ -0,0 +1,272 @@
+/* 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 = ["Social", "OpenGraphBuilder",
+                         "DynamicResizeWatcher", "sizeSocialPanelToContent"];
+
+const Ci = Components.interfaces;
+const Cc = Components.classes;
+const Cu = Components.utils;
+
+// The minimum sizes for the auto-resize panel code, minimum size necessary to
+// properly show the error page in the panel.
+const PANEL_MIN_HEIGHT = 190;
+const PANEL_MIN_WIDTH = 330;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "CustomizableUI",
+  "resource:///modules/CustomizableUI.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "SocialService",
+  "resource:///modules/SocialService.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "PageMetadata",
+  "resource://gre/modules/PageMetadata.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "PlacesUtils",
+  "resource://gre/modules/PlacesUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "Promise",
+  "resource://gre/modules/Promise.jsm");
+
+
+this.Social = {
+  initialized: false,
+  lastEventReceived: 0,
+  providers: [],
+  _disabledForSafeMode: false,
+
+  init: function Social_init() {
+    this._disabledForSafeMode = Services.appinfo.inSafeMode && this.enabled;
+    let deferred = Promise.defer();
+
+    if (this.initialized) {
+      deferred.resolve(true);
+      return deferred.promise;
+    }
+    this.initialized = true;
+    // if SocialService.hasEnabledProviders, retreive the providers so the
+    // front-end can generate UI
+    if (SocialService.hasEnabledProviders) {
+      // Retrieve the current set of providers, and set the current provider.
+      SocialService.getOrderedProviderList(function (providers) {
+        Social._updateProviderCache(providers);
+        Social._updateEnabledState(SocialService.enabled);
+        deferred.resolve(false);
+      });
+    } else {
+      deferred.resolve(false);
+    }
+
+    // Register an observer for changes to the provider list
+    SocialService.registerProviderListener(function providerListener(topic, origin, providers) {
+      // An engine change caused by adding/removing a provider should notify.
+      // any providers we receive are enabled in the AddonsManager
+      if (topic == "provider-installed" || topic == "provider-uninstalled") {
+        // installed/uninstalled do not send the providers param
+        Services.obs.notifyObservers(null, "social:" + topic, origin);
+        return;
+      }
+      if (topic == "provider-enabled") {
+        Social._updateProviderCache(providers);
+        Social._updateEnabledState(true);
+        Services.obs.notifyObservers(null, "social:" + topic, origin);
+        return;
+      }
+      if (topic == "provider-disabled") {
+        // a provider was removed from the list of providers, update states
+        Social._updateProviderCache(providers);
+        Social._updateEnabledState(providers.length > 0);
+        Services.obs.notifyObservers(null, "social:" + topic, origin);
+        return;
+      }
+      if (topic == "provider-update") {
+        // a provider has self-updated its manifest, we need to update our cache
+        // and reload the provider.
+        Social._updateProviderCache(providers);
+        let provider = Social._getProviderFromOrigin(origin);
+        provider.reload();
+      }
+    });
+    return deferred.promise;
+  },
+
+  _updateEnabledState: function(enable) {
+    for (let p of Social.providers) {
+      p.enabled = enable;
+    }
+  },
+
+  // Called to update our cache of providers and set the current provider
+  _updateProviderCache: function (providers) {
+    this.providers = providers;
+    Services.obs.notifyObservers(null, "social:providers-changed", null);
+  },
+
+  get enabled() {
+    return !this._disabledForSafeMode && this.providers.length > 0;
+  },
+
+  _getProviderFromOrigin: function (origin) {
+    for (let p of this.providers) {
+      if (p.origin == origin) {
+        return p;
+      }
+    }
+    return null;
+  },
+
+  getManifestByOrigin: function(origin) {
+    return SocialService.getManifestByOrigin(origin);
+  },
+
+  installProvider: function(data, installCallback, options={}) {
+    SocialService.installProvider(data, installCallback, options);
+  },
+
+  uninstallProvider: function(origin, aCallback) {
+    SocialService.uninstallProvider(origin, aCallback);
+  },
+
+  // Activation functionality
+  activateFromOrigin: function (origin, callback) {
+    // It's OK if the provider has already been activated - we still get called
+    // back with it.
+    SocialService.enableProvider(origin, callback);
+  }
+};
+
+function sizeSocialPanelToContent(panel, iframe, requestedSize) {
+  let doc = iframe.contentDocument;
+  if (!doc || !doc.body) {
+    return;
+  }
+  // We need an element to use for sizing our panel.  See if the body defines
+  // an id for that element, otherwise use the body itself.
+  let body = doc.body;
+  let docEl = doc.documentElement;
+  let bodyId = body.getAttribute("contentid");
+  if (bodyId) {
+    body = doc.getElementById(bodyId) || doc.body;
+  }
+  // offsetHeight/Width don't include margins, so account for that.
+  let cs = doc.defaultView.getComputedStyle(body);
+  let width = Math.max(PANEL_MIN_WIDTH, docEl.offsetWidth);
+  let height = Math.max(PANEL_MIN_HEIGHT, docEl.offsetHeight);
+  // if the panel is preloaded prior to being shown, cs will be null.  in that
+  // case use the minimum size for the panel until it is shown.
+  if (cs) {
+    let computedHeight = parseInt(cs.marginTop) + body.offsetHeight + parseInt(cs.marginBottom);
+    height = Math.max(computedHeight, height);
+    let computedWidth = parseInt(cs.marginLeft) + body.offsetWidth + parseInt(cs.marginRight);
+    width = Math.max(computedWidth, width);
+  }
+
+  // if our scrollHeight is still larger than the iframe, the css calculations
+  // above did not work for this site, increase the height. This can happen if
+  // the site increases its height for additional UI.
+  if (docEl.scrollHeight > iframe.boxObject.height)
+    height = docEl.scrollHeight;
+
+  // if a size was defined in the manifest use it as a minimum
+  if (requestedSize) {
+    if (requestedSize.height)
+      height = Math.max(height, requestedSize.height);
+    if (requestedSize.width)
+      width = Math.max(width, requestedSize.width);
+  }
+
+  // add the extra space used by the panel (toolbar, borders, etc) if the iframe
+  // has been loaded
+  if (iframe.boxObject.width && iframe.boxObject.height) {
+    // add extra space the panel needs if any
+    width += panel.boxObject.width - iframe.boxObject.width;
+    height += panel.boxObject.height - iframe.boxObject.height;
+  }
+
+  // using panel.sizeTo will ignore css transitions, set size via style
+  if (Math.abs(panel.boxObject.width - width) >= 2)
+    panel.style.width = width + "px";
+  if (Math.abs(panel.boxObject.height - height) >= 2)
+    panel.style.height = height + "px";
+}
+
+function DynamicResizeWatcher() {
+  this._mutationObserver = null;
+}
+
+DynamicResizeWatcher.prototype = {
+  start: function DynamicResizeWatcher_start(panel, iframe, requestedSize) {
+    this.stop(); // just in case...
+    let doc = iframe.contentDocument;
+    this._mutationObserver = new iframe.contentWindow.MutationObserver((mutations) => {
+      sizeSocialPanelToContent(panel, iframe, requestedSize);
+    });
+    // Observe anything that causes the size to change.
+    let config = {attributes: true, characterData: true, childList: true, subtree: true};
+    this._mutationObserver.observe(doc, config);
+    // and since this may be setup after the load event has fired we do an
+    // initial resize now.
+    sizeSocialPanelToContent(panel, iframe, requestedSize);
+  },
+  stop: function DynamicResizeWatcher_stop() {
+    if (this._mutationObserver) {
+      try {
+        this._mutationObserver.disconnect();
+      } catch (ex) {
+        // may get "TypeError: can't access dead object" which seems strange,
+        // but doesn't seem to indicate a real problem, so ignore it...
+      }
+      this._mutationObserver = null;
+    }
+  }
+}
+
+
+this.OpenGraphBuilder = {
+  generateEndpointURL: function(URLTemplate, pageData) {
+    // support for existing oexchange style endpoints by supporting their
+    // querystring arguments. parse the query string template and do
+    // replacements where necessary the query names may be different than ours,
+    // so we could see u=%{url} or url=%{url}
+    let [endpointURL, queryString] = URLTemplate.split("?");
+    let query = {};
+    if (queryString) {
+      queryString.split('&').forEach(function (val) {
+        let [name, value] = val.split('=');
+        let p = /%\{(.+)\}/.exec(value);
+        if (!p) {
+          // preserve non-template query vars
+          query[name] = value;
+        } else if (pageData[p[1]]) {
+          if (p[1] == "previews")
+            query[name] = pageData[p[1]][0];
+          else
+            query[name] = pageData[p[1]];
+        } else if (p[1] == "body") {
+          // build a body for emailers
+          let body = "";
+          if (pageData.title)
+            body += pageData.title + "\n\n";
+          if (pageData.description)
+            body += pageData.description + "\n\n";
+          if (pageData.text)
+            body += pageData.text + "\n\n";
+          body += pageData.url;
+          query["body"] = body;
+        }
+      });
+      // if the url template doesn't have title and no text was provided, add the title as the text.
+      if (!query.text && !query.title && pageData.title) {
+        query.text = pageData.title;
+      }
+    }
+    var str = [];
+    for (let p in query)
+       str.push(p + "=" + encodeURIComponent(query[p]));
+    if (str.length)
+      endpointURL = endpointURL + "?" + str.join("&");
+    return endpointURL;
+  },
+};
diff --git a/browser/modules/SocialService.jsm b/browser/modules/SocialService.jsm
new file mode 100644
index 000000000..95f5e0259
--- /dev/null
+++ b/browser/modules/SocialService.jsm
@@ -0,0 +1,1097 @@
+/* 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/. */
+
+this.EXPORTED_SYMBOLS = ["SocialService"];
+
+const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/AddonManager.jsm");
+Cu.import("resource://gre/modules/PlacesUtils.jsm");
+
+const URI_EXTENSION_STRINGS  = "chrome://mozapps/locale/extensions/extensions.properties";
+const ADDON_TYPE_SERVICE     = "service";
+const ID_SUFFIX              = "@services.mozilla.org";
+const STRING_TYPE_NAME       = "type.%ID%.name";
+
+XPCOMUtils.defineLazyModuleGetter(this, "DeferredTask", "resource://gre/modules/DeferredTask.jsm");
+
+XPCOMUtils.defineLazyServiceGetter(this, "etld",
+                                   "@mozilla.org/network/effective-tld-service;1",
+                                   "nsIEffectiveTLDService");
+
+/**
+ * The SocialService is the public API to social providers - it tracks which
+ * providers are installed and enabled, and is the entry-point for access to
+ * the provider itself.
+ */
+
+// Internal helper methods and state
+var SocialServiceInternal = {
+  get enabled() {
+    return this.providerArray.length > 0;
+  },
+
+  get providerArray() {
+    return Object.keys(this.providers).map(origin => this.providers[origin]);
+  },
+  *manifestsGenerator() {
+    // Retrieve the manifests of installed providers from prefs
+    let MANIFEST_PREFS = Services.prefs.getBranch("social.manifest.");
+    let prefs = MANIFEST_PREFS.getChildList("", []);
+    for (let pref of prefs) {
+      // we only consider manifests in user level prefs to be *installed*
+      if (!MANIFEST_PREFS.prefHasUserValue(pref))
+        continue;
+      try {
+        var manifest = JSON.parse(MANIFEST_PREFS.getComplexValue(pref, Ci.nsISupportsString).data);
+        if (manifest && typeof(manifest) == "object" && manifest.origin)
+          yield manifest;
+      } catch (err) {
+        Cu.reportError("SocialService: failed to load manifest: " + pref +
+                       ", exception: " + err);
+      }
+    }
+  },
+  get manifests() {
+    return this.manifestsGenerator();
+  },
+  getManifestPrefname: function(origin) {
+    // Retrieve the prefname for a given origin/manifest.
+    // If no existing pref, return a generated prefname.
+    let MANIFEST_PREFS = Services.prefs.getBranch("social.manifest.");
+    let prefs = MANIFEST_PREFS.getChildList("", []);
+    for (let pref of prefs) {
+      try {
+        var manifest = JSON.parse(MANIFEST_PREFS.getComplexValue(pref, Ci.nsISupportsString).data);
+        if (manifest.origin == origin) {
+          return pref;
+        }
+      } catch (err) {
+        Cu.reportError("SocialService: failed to load manifest: " + pref +
+                       ", exception: " + err);
+      }
+    }
+    let originUri = Services.io.newURI(origin, null, null);
+    return originUri.hostPort.replace('.', '-');
+  },
+  orderedProviders: function(aCallback) {
+    if (SocialServiceInternal.providerArray.length < 2) {
+      schedule(function () {
+        aCallback(SocialServiceInternal.providerArray);
+      });
+      return;
+    }
+    // query moz_hosts for frecency.  since some providers may not have a
+    // frecency entry, we need to later sort on our own. We use the providers
+    // object below as an easy way to later record the frecency on the provider
+    // object from the query results.
+    let hosts = [];
+    let providers = {};
+
+    for (let p of SocialServiceInternal.providerArray) {
+      p.frecency = 0;
+      providers[p.domain] = p;
+      hosts.push(p.domain);
+    }
+
+    // cannot bind an array to stmt.params so we have to build the string
+    let stmt = PlacesUtils.history.QueryInterface(Ci.nsPIPlacesDatabase)
+                                 .DBConnection.createAsyncStatement(
+      "SELECT host, frecency FROM moz_hosts WHERE host IN (" +
+      hosts.map(host => '"' + host + '"').join(",") + ") "
+    );
+
+    try {
+      stmt.executeAsync({
+        handleResult: function(aResultSet) {
+          let row;
+          while ((row = aResultSet.getNextRow())) {
+            let rh = row.getResultByName("host");
+            let frecency = row.getResultByName("frecency");
+            providers[rh].frecency = parseInt(frecency) || 0;
+          }
+        },
+        handleError: function(aError) {
+          Cu.reportError(aError.message + " (Result = " + aError.result + ")");
+        },
+        handleCompletion: function(aReason) {
+          // the query may not have returned all our providers, so we have
+          // stamped the frecency on the provider and sort here. This makes sure
+          // all enabled providers get sorted even with frecency zero.
+          let providerList = SocialServiceInternal.providerArray;
+          // reverse sort
+          aCallback(providerList.sort((a, b) => b.frecency - a.frecency));
+        }
+      });
+    } finally {
+      stmt.finalize();
+    }
+  }
+};
+
+XPCOMUtils.defineLazyGetter(SocialServiceInternal, "providers", function () {
+  initService();
+  let providers = {};
+  for (let manifest of this.manifests) {
+    try {
+      if (ActiveProviders.has(manifest.origin)) {
+        // enable the api when a provider is enabled
+        let provider = new SocialProvider(manifest);
+        providers[provider.origin] = provider;
+      }
+    } catch (err) {
+      Cu.reportError("SocialService: failed to load provider: " + manifest.origin +
+                     ", exception: " + err);
+    }
+  }
+  return providers;
+});
+
+function getOriginActivationType(origin) {
+  // if this is an about uri, treat it as a directory
+  let URI = Services.io.newURI(origin, null, null);
+  let principal = Services.scriptSecurityManager.createCodebasePrincipal(URI, {});
+  if (Services.scriptSecurityManager.isSystemPrincipal(principal) || origin == "moz-safe-about:home") {
+    return "internal";
+  }
+
+  let directories = Services.prefs.getCharPref("social.directories").split(',');
+  if (directories.indexOf(origin) >= 0)
+    return "directory";
+
+  return "foreign";
+}
+
+var ActiveProviders = {
+  get _providers() {
+    delete this._providers;
+    this._providers = {};
+    try {
+      let pref = Services.prefs.getComplexValue("social.activeProviders",
+                                                Ci.nsISupportsString);
+      this._providers = JSON.parse(pref);
+    } catch (ex) {}
+    return this._providers;
+  },
+
+  has: function (origin) {
+    return (origin in this._providers);
+  },
+
+  add: function (origin) {
+    this._providers[origin] = 1;
+    this._deferredTask.arm();
+  },
+
+  delete: function (origin) {
+    delete this._providers[origin];
+    this._deferredTask.arm();
+  },
+
+  flush: function () {
+    this._deferredTask.disarm();
+    this._persist();
+  },
+
+  get _deferredTask() {
+    delete this._deferredTask;
+    return this._deferredTask = new DeferredTask(this._persist.bind(this), 0);
+  },
+
+  _persist: function () {
+    let string = Cc["@mozilla.org/supports-string;1"].
+                 createInstance(Ci.nsISupportsString);
+    string.data = JSON.stringify(this._providers);
+    Services.prefs.setComplexValue("social.activeProviders",
+                                   Ci.nsISupportsString, string);
+  }
+};
+
+function migrateSettings() {
+  let activeProviders, enabled;
+  try {
+    activeProviders = Services.prefs.getCharPref("social.activeProviders");
+  } catch (e) {
+    // not set, we'll check if we need to migrate older prefs
+  }
+  if (Services.prefs.prefHasUserValue("social.enabled")) {
+    enabled = Services.prefs.getBoolPref("social.enabled");
+  }
+  if (activeProviders) {
+    // migration from fx21 to fx22 or later
+    // ensure any *builtin* provider in activeproviders is in user level prefs
+    for (let origin in ActiveProviders._providers) {
+      let prefname;
+      let manifest;
+      let defaultManifest;
+      try {
+        prefname = getPrefnameFromOrigin(origin);
+        manifest = JSON.parse(Services.prefs.getComplexValue(prefname, Ci.nsISupportsString).data);
+      } catch (e) {
+        // Our preference is missing or bad, remove from ActiveProviders and
+        // continue. This is primarily an error-case and should only be
+        // reached by either messing with preferences or hitting the one or
+        // two days of nightly that ran into it, so we'll flush right away.
+        ActiveProviders.delete(origin);
+        ActiveProviders.flush();
+        continue;
+      }
+      let needsUpdate = !manifest.updateDate;
+      // fx23 may have built-ins with shareURL
+      try {
+        defaultManifest = Services.prefs.getDefaultBranch(null)
+                        .getComplexValue(prefname, Ci.nsISupportsString).data;
+        defaultManifest = JSON.parse(defaultManifest);
+      } catch (e) {
+        // not a built-in, continue
+      }
+      if (defaultManifest) {
+        if (defaultManifest.shareURL && !manifest.shareURL) {
+          manifest.shareURL = defaultManifest.shareURL;
+          needsUpdate = true;
+        }
+        if (defaultManifest.version && (!manifest.version || defaultManifest.version > manifest.version)) {
+          manifest = defaultManifest;
+          needsUpdate = true;
+        }
+      }
+      if (needsUpdate) {
+        // the provider was installed with an older build, so we will update the
+        // timestamp and ensure the manifest is in user prefs
+        delete manifest.builtin;
+        // we're potentially updating for share, so always mark the updateDate
+        manifest.updateDate = Date.now();
+        if (!manifest.installDate)
+          manifest.installDate = 0; // we don't know when it was installed
+
+        let string = Cc["@mozilla.org/supports-string;1"].
+                     createInstance(Ci.nsISupportsString);
+        string.data = JSON.stringify(manifest);
+        Services.prefs.setComplexValue(prefname, Ci.nsISupportsString, string);
+      }
+      // as of fx 29, we no longer rely on social.enabled. migration from prior
+      // versions should disable all service addons if social.enabled=false
+      if (enabled === false) {
+        ActiveProviders.delete(origin);
+      }
+    }
+    ActiveProviders.flush();
+    Services.prefs.clearUserPref("social.enabled");
+    return;
+  }
+
+  // primary migration from pre-fx21
+  let active;
+  try {
+    active = Services.prefs.getBoolPref("social.active");
+  } catch (e) {}
+  if (!active)
+    return;
+
+  // primary difference from SocialServiceInternal.manifests is that we
+  // only read the default branch here.
+  let manifestPrefs = Services.prefs.getDefaultBranch("social.manifest.");
+  let prefs = manifestPrefs.getChildList("", []);
+  for (let pref of prefs) {
+    try {
+      let manifest;
+      try {
+        manifest = JSON.parse(manifestPrefs.getComplexValue(pref, Ci.nsISupportsString).data);
+      } catch (e) {
+        // bad or missing preference, we wont update this one.
+        continue;
+      }
+      if (manifest && typeof(manifest) == "object" && manifest.origin) {
+        // our default manifests have been updated with the builtin flags as of
+        // fx22, delete it so we can set the user-pref
+        delete manifest.builtin;
+        if (!manifest.updateDate) {
+          manifest.updateDate = Date.now();
+          manifest.installDate = 0; // we don't know when it was installed
+        }
+
+        let string = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
+        string.data = JSON.stringify(manifest);
+        // pref here is just the branch name, set the full pref name
+        Services.prefs.setComplexValue("social.manifest." + pref, Ci.nsISupportsString, string);
+        ActiveProviders.add(manifest.origin);
+        ActiveProviders.flush();
+        // social.active was used at a time that there was only one
+        // builtin, we'll assume that is still the case
+        return;
+      }
+    } catch (err) {
+      Cu.reportError("SocialService: failed to load manifest: " + pref + ", exception: " + err);
+    }
+  }
+}
+
+function initService() {
+  Services.obs.addObserver(function xpcomShutdown() {
+    ActiveProviders.flush();
+    SocialService._providerListeners = null;
+    Services.obs.removeObserver(xpcomShutdown, "xpcom-shutdown");
+  }, "xpcom-shutdown", false);
+
+  try {
+    migrateSettings();
+  } catch (e) {
+    // no matter what, if migration fails we do not want to render social
+    // unusable. Worst case scenario is that, when upgrading Firefox, previously
+    // enabled providers are not migrated.
+    Cu.reportError("Error migrating social settings: " + e);
+  }
+}
+
+function schedule(callback) {
+  Services.tm.mainThread.dispatch(callback, Ci.nsIThread.DISPATCH_NORMAL);
+}
+
+// Public API
+this.SocialService = {
+  get hasEnabledProviders() {
+    // used as an optimization during startup, can be used to check if further
+    // initialization should be done (e.g. creating the instances of
+    // SocialProvider and turning on UI). ActiveProviders may have changed and
+    // not yet flushed so we check the active providers array
+    for (let p in ActiveProviders._providers) {
+      return true;
+    }
+    return false;
+  },
+  get enabled() {
+    return SocialServiceInternal.enabled;
+  },
+  set enabled(val) {
+    throw new Error("not allowed to set SocialService.enabled");
+  },
+
+  // Enables a provider, the manifest must already exist in prefs. The provider
+  // may or may not have previously been added. onDone is always called
+  // - with null if no such provider exists, or the activated provider on
+  // success.
+  enableProvider: function enableProvider(origin, onDone) {
+    if (SocialServiceInternal.providers[origin]) {
+      schedule(function() {
+        onDone(SocialServiceInternal.providers[origin]);
+      });
+      return;
+    }
+    let manifest = SocialService.getManifestByOrigin(origin);
+    if (manifest) {
+      let addon = new AddonWrapper(manifest);
+      AddonManagerPrivate.callAddonListeners("onEnabling", addon, false);
+      addon.pendingOperations |= AddonManager.PENDING_ENABLE;
+      this.addProvider(manifest, onDone);
+      addon.pendingOperations -= AddonManager.PENDING_ENABLE;
+      AddonManagerPrivate.callAddonListeners("onEnabled", addon);
+      return;
+    }
+    schedule(function() {
+      onDone(null);
+    });
+  },
+
+  // Adds a provider given a manifest, and returns the added provider.
+  addProvider: function addProvider(manifest, onDone) {
+    if (SocialServiceInternal.providers[manifest.origin])
+      throw new Error("SocialService.addProvider: provider with this origin already exists");
+
+    // enable the api when a provider is enabled
+    let provider = new SocialProvider(manifest);
+    SocialServiceInternal.providers[provider.origin] = provider;
+    ActiveProviders.add(provider.origin);
+
+    this.getOrderedProviderList(function (providers) {
+      this._notifyProviderListeners("provider-enabled", provider.origin, providers);
+      if (onDone)
+        onDone(provider);
+    }.bind(this));
+  },
+
+  // Removes a provider with the given origin, and notifies when the removal is
+  // complete.
+  disableProvider: function disableProvider(origin, onDone) {
+    if (!(origin in SocialServiceInternal.providers))
+      throw new Error("SocialService.disableProvider: no provider with origin " + origin + " exists!");
+
+    let provider = SocialServiceInternal.providers[origin];
+    let manifest = SocialService.getManifestByOrigin(origin);
+    let addon = manifest && new AddonWrapper(manifest);
+    if (addon) {
+      AddonManagerPrivate.callAddonListeners("onDisabling", addon, false);
+      addon.pendingOperations |= AddonManager.PENDING_DISABLE;
+    }
+    provider.enabled = false;
+
+    ActiveProviders.delete(provider.origin);
+
+    delete SocialServiceInternal.providers[origin];
+
+    if (addon) {
+      // we have to do this now so the addon manager ui will update an uninstall
+      // correctly.
+      addon.pendingOperations -= AddonManager.PENDING_DISABLE;
+      AddonManagerPrivate.callAddonListeners("onDisabled", addon);
+    }
+
+    this.getOrderedProviderList(function (providers) {
+      this._notifyProviderListeners("provider-disabled", origin, providers);
+      if (onDone)
+        onDone();
+    }.bind(this));
+  },
+
+  // Returns a single provider object with the specified origin.  The provider
+  // must be "installed" (ie, in ActiveProviders)
+  getProvider: function getProvider(origin, onDone) {
+    schedule((function () {
+      onDone(SocialServiceInternal.providers[origin] || null);
+    }).bind(this));
+  },
+
+  // Returns an unordered array of installed providers
+  getProviderList: function(onDone) {
+    schedule(function () {
+      onDone(SocialServiceInternal.providerArray);
+    });
+  },
+
+  getManifestByOrigin: function(origin) {
+    for (let manifest of SocialServiceInternal.manifests) {
+      if (origin == manifest.origin) {
+        return manifest;
+      }
+    }
+    return null;
+  },
+
+  // Returns an array of installed providers, sorted by frecency
+  getOrderedProviderList: function(onDone) {
+    SocialServiceInternal.orderedProviders(onDone);
+  },
+
+  getOriginActivationType: function (origin) {
+    return getOriginActivationType(origin);
+  },
+
+  _providerListeners: new Map(),
+  registerProviderListener: function registerProviderListener(listener) {
+    this._providerListeners.set(listener, 1);
+  },
+  unregisterProviderListener: function unregisterProviderListener(listener) {
+    this._providerListeners.delete(listener);
+  },
+
+  _notifyProviderListeners: function (topic, origin, providers) {
+    for (let [listener, ] of this._providerListeners) {
+      try {
+        listener(topic, origin, providers);
+      } catch (ex) {
+        Components.utils.reportError("SocialService: provider listener threw an exception: " + ex);
+      }
+    }
+  },
+
+  _manifestFromData: function(type, data, installOrigin) {
+    let featureURLs = ['shareURL'];
+    let resolveURLs = featureURLs.concat(['postActivationURL']);
+
+    if (type == 'directory' || type == 'internal') {
+      // directory provided manifests must have origin in manifest, use that
+      if (!data['origin']) {
+        Cu.reportError("SocialService.manifestFromData directory service provided manifest without origin.");
+        return null;
+      }
+      installOrigin = data.origin;
+    }
+    // force/fixup origin
+    let URI = Services.io.newURI(installOrigin, null, null);
+    let principal = Services.scriptSecurityManager.createCodebasePrincipal(URI, {});
+    data.origin = principal.origin;
+
+    // iconURL and name are required
+    let providerHasFeatures = featureURLs.some(url => data[url]);
+    if (!providerHasFeatures) {
+      Cu.reportError("SocialService.manifestFromData manifest missing required urls.");
+      return null;
+    }
+    if (!data['name'] || !data['iconURL']) {
+      Cu.reportError("SocialService.manifestFromData manifest missing name or iconURL.");
+      return null;
+    }
+    for (let url of resolveURLs) {
+      if (data[url]) {
+        try {
+          let resolved = Services.io.newURI(principal.URI.resolve(data[url]), null, null);
+          if (!(resolved.schemeIs("http") || resolved.schemeIs("https"))) {
+            Cu.reportError("SocialService.manifestFromData unsupported scheme '" + resolved.scheme + "' for " + principal.origin);
+            return null;
+          }
+          data[url] = resolved.spec;
+        } catch (e) {
+          Cu.reportError("SocialService.manifestFromData unable to resolve '" + url + "' for " + principal.origin);
+          return null;
+        }
+      }
+    }
+    return data;
+  },
+
+  _showInstallNotification: function(data, aAddonInstaller) {
+    let brandBundle = Services.strings.createBundle("chrome://branding/locale/brand.properties");
+    let browserBundle = Services.strings.createBundle("chrome://browser/locale/browser.properties");
+
+    // internal/directory activations need to use the manifest origin, any other
+    // use the domain activation is occurring on
+    let url = data.url;
+    if (data.installType == "internal" || data.installType == "directory") {
+      url = data.manifest.origin;
+    }
+    let requestingURI =  Services.io.newURI(url, null, null);
+    let productName = brandBundle.GetStringFromName("brandShortName");
+
+    let message = browserBundle.formatStringFromName("service.install.description",
+                                                     [requestingURI.host, productName], 2);
+
+    let action = {
+      label: browserBundle.GetStringFromName("service.install.ok.label"),
+      accessKey: browserBundle.GetStringFromName("service.install.ok.accesskey"),
+      callback: function() {
+        aAddonInstaller.install();
+      },
+    };
+
+    let options = {
+                    learnMoreURL: Services.urlFormatter.formatURLPref("app.support.baseURL") + "social-api",
+                  };
+    let anchor = "servicesInstall-notification-icon";
+    let notificationid = "servicesInstall";
+    data.window.PopupNotifications.show(data.window.gBrowser.selectedBrowser,
+                                        notificationid, message, anchor,
+                                        action, [], options);
+  },
+
+  installProvider: function(data, installCallback, options={}) {
+    data.installType = getOriginActivationType(data.origin);
+    // if we get data, we MUST have a valid manifest generated from the data
+    let manifest = this._manifestFromData(data.installType, data.manifest, data.origin);
+    if (!manifest)
+      throw new Error("SocialService.installProvider: service configuration is invalid from " + data.url);
+
+    let addon = new AddonWrapper(manifest);
+    if (addon && addon.blocklistState == Ci.nsIBlocklistService.STATE_BLOCKED)
+      throw new Error("installProvider: provider with origin [" +
+                      data.origin + "] is blocklisted");
+    // manifestFromData call above will enforce correct origin. To support
+    // activation from about: uris, we need to be sure to use the updated
+    // origin on the manifest.
+    data.manifest = manifest;
+    let id = getAddonIDFromOrigin(manifest.origin);
+    AddonManager.getAddonByID(id, function(aAddon) {
+      if (aAddon && aAddon.userDisabled) {
+        aAddon.cancelUninstall();
+        aAddon.userDisabled = false;
+      }
+      schedule(function () {
+        try {
+          this._installProvider(data, options, aManifest => {
+              this._notifyProviderListeners("provider-installed", aManifest.origin);
+              installCallback(aManifest);
+          });
+        } catch (e) {
+          Cu.reportError("Activation failed: " + e);
+          installCallback(null);
+        }
+      }.bind(this));
+    }.bind(this));
+  },
+
+  _installProvider: function(data, options, installCallback) {
+    if (!data.manifest)
+      throw new Error("Cannot install provider without manifest data");
+
+    if (data.installType == "foreign" && !Services.prefs.getBoolPref("social.remote-install.enabled"))
+      throw new Error("Remote install of services is disabled");
+
+    // if installing from any website, the install must happen over https.
+    // "internal" are installs from about:home or similar
+    if (data.installType != "internal" && !Services.io.newURI(data.origin, null, null).schemeIs("https")) {
+      throw new Error("attempt to activate provider over unsecured channel: " + data.origin);
+    }
+
+    let installer = new AddonInstaller(data.url, data.manifest, installCallback);
+    let bypassPanel = options.bypassInstallPanel ||
+                      (data.installType == "internal" && data.manifest.oneclick);
+    if (bypassPanel)
+      installer.install();
+    else
+      this._showInstallNotification(data, installer);
+  },
+
+  createWrapper: function(manifest) {
+    return new AddonWrapper(manifest);
+  },
+
+  /**
+   * updateProvider is used from the worker to self-update.  Since we do not
+   * have knowledge of the currently selected provider here, we will notify
+   * the front end to deal with any reload.
+   */
+  updateProvider: function(aUpdateOrigin, aManifest) {
+    let installType = this.getOriginActivationType(aUpdateOrigin);
+    // if we get data, we MUST have a valid manifest generated from the data
+    let manifest = this._manifestFromData(installType, aManifest, aUpdateOrigin);
+    if (!manifest)
+      throw new Error("SocialService.installProvider: service configuration is invalid from " + aUpdateOrigin);
+
+    // overwrite the preference
+    let string = Cc["@mozilla.org/supports-string;1"].
+                 createInstance(Ci.nsISupportsString);
+    string.data = JSON.stringify(manifest);
+    Services.prefs.setComplexValue(getPrefnameFromOrigin(manifest.origin), Ci.nsISupportsString, string);
+
+    // overwrite the existing provider then notify the front end so it can
+    // handle any reload that might be necessary.
+    if (ActiveProviders.has(manifest.origin)) {
+      let provider = SocialServiceInternal.providers[manifest.origin];
+      provider.enabled = false;
+      provider = new SocialProvider(manifest);
+      SocialServiceInternal.providers[provider.origin] = provider;
+      // update the cache and ui, reload provider if necessary
+      this.getOrderedProviderList(providers => {
+        this._notifyProviderListeners("provider-update", provider.origin, providers);
+      });
+    }
+
+  },
+
+  uninstallProvider: function(origin, aCallback) {
+    let manifest = SocialService.getManifestByOrigin(origin);
+    let addon = new AddonWrapper(manifest);
+    addon.uninstall(aCallback);
+  }
+};
+
+/**
+ * The SocialProvider object represents a social provider.
+ *
+ * @constructor
+ * @param {jsobj} object representing the manifest file describing this provider
+ * @param {bool} boolean indicating whether this provider is "built in"
+ */
+function SocialProvider(input) {
+  if (!input.name)
+    throw new Error("SocialProvider must be passed a name");
+  if (!input.origin)
+    throw new Error("SocialProvider must be passed an origin");
+
+  let addon = new AddonWrapper(input);
+  if (addon.blocklistState == Ci.nsIBlocklistService.STATE_BLOCKED)
+    throw new Error("SocialProvider: provider with origin [" +
+                    input.origin + "] is blocklisted");
+
+  this.name = input.name;
+  this.iconURL = input.iconURL;
+  this.icon32URL = input.icon32URL;
+  this.icon64URL = input.icon64URL;
+  this.shareURL = input.shareURL;
+  this.postActivationURL = input.postActivationURL;
+  this.origin = input.origin;
+  let originUri = Services.io.newURI(input.origin, null, null);
+  this.principal = Services.scriptSecurityManager.createCodebasePrincipal(originUri, {});
+  this.ambientNotificationIcons = {};
+  this.errorState = null;
+  this.frecency = 0;
+
+  try {
+    this.domain = etld.getBaseDomainFromHost(originUri.host);
+  } catch (e) {
+    this.domain = originUri.host;
+  }
+}
+
+SocialProvider.prototype = {
+  reload: function() {
+    // calling terminate/activate does not set the enabled state whereas setting
+    // enabled will call terminate/activate
+    this.enabled = false;
+    this.enabled = true;
+    Services.obs.notifyObservers(null, "social:provider-reload", this.origin);
+  },
+
+  // Provider enabled/disabled state.
+  _enabled: false,
+  get enabled() {
+    return this._enabled;
+  },
+  set enabled(val) {
+    let enable = !!val;
+    if (enable == this._enabled)
+      return;
+
+    this._enabled = enable;
+
+    if (enable) {
+      this._activate();
+    } else {
+      this._terminate();
+    }
+  },
+
+  get manifest() {
+    return SocialService.getManifestByOrigin(this.origin);
+  },
+
+  getPageSize: function(name) {
+    let manifest = this.manifest;
+    if (manifest && manifest.pageSize)
+      return manifest.pageSize[name];
+    return undefined;
+  },
+
+  // Internal helper methods
+  _activate: function _activate() {
+  },
+
+  _terminate: function _terminate() {
+    this.errorState = null;
+  },
+
+  /**
+   * Checks if a given URI is of the same origin as the provider.
+   *
+   * Returns true or false.
+   *
+   * @param {URI or string} uri
+   */
+  isSameOrigin: function isSameOrigin(uri, allowIfInheritsPrincipal) {
+    if (!uri)
+      return false;
+    if (typeof uri == "string") {
+      try {
+        uri = Services.io.newURI(uri, null, null);
+      } catch (ex) {
+        // an invalid URL can't be loaded!
+        return false;
+      }
+    }
+    try {
+      this.principal.checkMayLoad(
+        uri, // the thing to check.
+        false, // reportError - we do our own reporting when necessary.
+        allowIfInheritsPrincipal
+      );
+      return true;
+    } catch (ex) {
+      return false;
+    }
+  },
+
+  /**
+   * Resolve partial URLs for a provider.
+   *
+   * Returns nsIURI object or null on failure
+   *
+   * @param {string} url
+   */
+  resolveUri: function resolveUri(url) {
+    try {
+      let fullURL = this.principal.URI.resolve(url);
+      return Services.io.newURI(fullURL, null, null);
+    } catch (ex) {
+      Cu.reportError("mozSocial: failed to resolve window URL: " + url + "; " + ex);
+      return null;
+    }
+  }
+};
+
+function getAddonIDFromOrigin(origin) {
+  let originUri = Services.io.newURI(origin, null, null);
+  return originUri.host + ID_SUFFIX;
+}
+
+function getPrefnameFromOrigin(origin) {
+  return "social.manifest." + SocialServiceInternal.getManifestPrefname(origin);
+}
+
+function AddonInstaller(sourceURI, aManifest, installCallback) {
+  aManifest.updateDate = Date.now();
+  // get the existing manifest for installDate
+  let manifest = SocialService.getManifestByOrigin(aManifest.origin);
+  let isNewInstall = !manifest;
+  if (manifest && manifest.installDate)
+    aManifest.installDate = manifest.installDate;
+  else
+    aManifest.installDate = aManifest.updateDate;
+
+  this.sourceURI = sourceURI;
+  this.install = function() {
+    let addon = this.addon;
+    if (isNewInstall) {
+      AddonManagerPrivate.callInstallListeners("onExternalInstall", null, addon, null, false);
+      AddonManagerPrivate.callAddonListeners("onInstalling", addon, false);
+    }
+
+    let string = Cc["@mozilla.org/supports-string;1"].
+                 createInstance(Ci.nsISupportsString);
+    string.data = JSON.stringify(aManifest);
+    Services.prefs.setComplexValue(getPrefnameFromOrigin(aManifest.origin), Ci.nsISupportsString, string);
+
+    if (isNewInstall) {
+      AddonManagerPrivate.callAddonListeners("onInstalled", addon);
+    }
+    installCallback(aManifest);
+  };
+  this.cancel = function() {
+    Services.prefs.clearUserPref(getPrefnameFromOrigin(aManifest.origin));
+  };
+  this.addon = new AddonWrapper(aManifest);
+}
+
+var SocialAddonProvider = {
+  startup: function() {},
+
+  shutdown: function() {},
+
+  updateAddonAppDisabledStates: function() {
+    // we wont bother with "enabling" services that are released from blocklist
+    for (let manifest of SocialServiceInternal.manifests) {
+      try {
+        if (ActiveProviders.has(manifest.origin)) {
+          let addon = new AddonWrapper(manifest);
+          if (addon.blocklistState != Ci.nsIBlocklistService.STATE_NOT_BLOCKED) {
+            SocialService.disableProvider(manifest.origin);
+          }
+        }
+      } catch (e) {
+        Cu.reportError(e);
+      }
+    }
+  },
+
+  getAddonByID: function(aId, aCallback) {
+    for (let manifest of SocialServiceInternal.manifests) {
+      if (aId == getAddonIDFromOrigin(manifest.origin)) {
+        aCallback(new AddonWrapper(manifest));
+        return;
+      }
+    }
+    aCallback(null);
+  },
+
+  getAddonsByTypes: function(aTypes, aCallback) {
+    if (aTypes && aTypes.indexOf(ADDON_TYPE_SERVICE) == -1) {
+      aCallback([]);
+      return;
+    }
+    aCallback([...SocialServiceInternal.manifests].map(a => new AddonWrapper(a)));
+  },
+
+  removeAddon: function(aAddon, aCallback) {
+    AddonManagerPrivate.callAddonListeners("onUninstalling", aAddon, false);
+    aAddon.pendingOperations |= AddonManager.PENDING_UNINSTALL;
+    Services.prefs.clearUserPref(getPrefnameFromOrigin(aAddon.manifest.origin));
+    aAddon.pendingOperations -= AddonManager.PENDING_UNINSTALL;
+    AddonManagerPrivate.callAddonListeners("onUninstalled", aAddon);
+    SocialService._notifyProviderListeners("provider-uninstalled", aAddon.manifest.origin);
+    if (aCallback)
+      schedule(aCallback);
+  }
+};
+
+
+function AddonWrapper(aManifest) {
+  this.manifest = aManifest;
+  this.id = getAddonIDFromOrigin(this.manifest.origin);
+  this._pending = AddonManager.PENDING_NONE;
+}
+AddonWrapper.prototype = {
+  get type() {
+    return ADDON_TYPE_SERVICE;
+  },
+
+  get appDisabled() {
+    return this.blocklistState == Ci.nsIBlocklistService.STATE_BLOCKED;
+  },
+
+  set softDisabled(val) {
+    this.userDisabled = val;
+  },
+
+  get softDisabled() {
+    return this.userDisabled;
+  },
+
+  get isCompatible() {
+    return true;
+  },
+
+  get isPlatformCompatible() {
+    return true;
+  },
+
+  get scope() {
+    return AddonManager.SCOPE_PROFILE;
+  },
+
+  get foreignInstall() {
+    return false;
+  },
+
+  isCompatibleWith: function(appVersion, platformVersion) {
+    return true;
+  },
+
+  get providesUpdatesSecurely() {
+    return true;
+  },
+
+  get blocklistState() {
+    return Services.blocklist.getAddonBlocklistState(this);
+  },
+
+  get blocklistURL() {
+    return Services.blocklist.getAddonBlocklistURL(this);
+  },
+
+  get screenshots() {
+    return [];
+  },
+
+  get pendingOperations() {
+    return this._pending || AddonManager.PENDING_NONE;
+  },
+  set pendingOperations(val) {
+    this._pending = val;
+  },
+
+  get operationsRequiringRestart() {
+    return AddonManager.OP_NEEDS_RESTART_NONE;
+  },
+
+  get size() {
+    return null;
+  },
+
+  get permissions() {
+    let permissions = 0;
+    // any "user defined" manifest can be removed
+    if (Services.prefs.prefHasUserValue(getPrefnameFromOrigin(this.manifest.origin)))
+      permissions = AddonManager.PERM_CAN_UNINSTALL;
+    if (!this.appDisabled) {
+      if (this.userDisabled) {
+        permissions |= AddonManager.PERM_CAN_ENABLE;
+      } else {
+        permissions |= AddonManager.PERM_CAN_DISABLE;
+      }
+    }
+    return permissions;
+  },
+
+  findUpdates: function(listener, reason, appVersion, platformVersion) {
+    if ("onNoCompatibilityUpdateAvailable" in listener)
+      listener.onNoCompatibilityUpdateAvailable(this);
+    if ("onNoUpdateAvailable" in listener)
+      listener.onNoUpdateAvailable(this);
+    if ("onUpdateFinished" in listener)
+      listener.onUpdateFinished(this);
+  },
+
+  get isActive() {
+    return ActiveProviders.has(this.manifest.origin);
+  },
+
+  get name() {
+    return this.manifest.name;
+  },
+  get version() {
+    return this.manifest.version ? this.manifest.version.toString() : "";
+  },
+
+  get iconURL() {
+    return this.manifest.icon32URL ? this.manifest.icon32URL : this.manifest.iconURL;
+  },
+  get icon64URL() {
+    return this.manifest.icon64URL;
+  },
+  get icons() {
+    let icons = {
+      16: this.manifest.iconURL
+    };
+    if (this.manifest.icon32URL)
+      icons[32] = this.manifest.icon32URL;
+    if (this.manifest.icon64URL)
+      icons[64] = this.manifest.icon64URL;
+    return icons;
+  },
+
+  get description() {
+    return this.manifest.description;
+  },
+  get homepageURL() {
+    return this.manifest.homepageURL;
+  },
+  get defaultLocale() {
+    return this.manifest.defaultLocale;
+  },
+  get selectedLocale() {
+    return this.manifest.selectedLocale;
+  },
+
+  get installDate() {
+    return this.manifest.installDate ? new Date(this.manifest.installDate) : null;
+  },
+  get updateDate() {
+    return this.manifest.updateDate ? new Date(this.manifest.updateDate) : null;
+  },
+
+  get creator() {
+    return new AddonManagerPrivate.AddonAuthor(this.manifest.author);
+  },
+
+  get userDisabled() {
+    return this.appDisabled || !ActiveProviders.has(this.manifest.origin);
+  },
+
+  set userDisabled(val) {
+    if (val == this.userDisabled)
+      return val;
+    if (val) {
+      SocialService.disableProvider(this.manifest.origin);
+    } else if (!this.appDisabled) {
+      SocialService.enableProvider(this.manifest.origin);
+    }
+    return val;
+  },
+
+  uninstall: function(aCallback) {
+    let prefName = getPrefnameFromOrigin(this.manifest.origin);
+    if (Services.prefs.prefHasUserValue(prefName)) {
+      if (ActiveProviders.has(this.manifest.origin)) {
+        SocialService.disableProvider(this.manifest.origin, function() {
+          SocialAddonProvider.removeAddon(this, aCallback);
+        }.bind(this));
+      } else {
+        SocialAddonProvider.removeAddon(this, aCallback);
+      }
+    } else {
+      schedule(aCallback);
+    }
+  },
+
+  cancelUninstall: function() {
+    this._pending -= AddonManager.PENDING_UNINSTALL;
+    AddonManagerPrivate.callAddonListeners("onOperationCancelled", this);
+  }
+};
+
+
+AddonManagerPrivate.registerProvider(SocialAddonProvider, [
+  new AddonManagerPrivate.AddonType(ADDON_TYPE_SERVICE, URI_EXTENSION_STRINGS,
+                                    STRING_TYPE_NAME,
+                                    AddonManager.VIEW_TYPE_LIST, 10000)
+]);
diff --git a/browser/modules/moz.build b/browser/modules/moz.build
index a7bbbc258..852a4c911 100644
--- a/browser/modules/moz.build
+++ b/browser/modules/moz.build
@@ -35,6 +35,8 @@ EXTRA_JS_MODULES += [
     'Sanitizer.jsm',
     'SelfSupportBackend.jsm',
     'SitePermissions.jsm',
+    'Social.jsm',
+    'SocialService.jsm',
     'TransientPrefs.jsm',
     'URLBarZoom.jsm',
     'webrtcUI.jsm',