Issue 3801 - Add pre-configurable preference for additional subscriptions

lib/prefs.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 115 matching lines @@
  *
  * @type {boolean}
  */
 defaults.shouldShowBlockElementMenu = true;
 /**
  * Whether to collapse placeholders for blocked elements.
  *
  * @type {boolean}
  */
 defaults.hidePlaceholders = true;
-/**
- * Whether to suppress the first run page. This preference isn't
- * set by the extension but can be pre-configured externally.
- *
- * @see https://adblockplus.org/development-builds/suppressing-the-first-run-page-on-chrome
- * @type {boolean}
- */
-defaults.suppress_first_run_page = false;
 
 /**
  * Whether notification opt-out UI should be shown.
  * @type {boolean}
  */
 defaults.notifications_showui = false;
 
 /**
  * Notification categories to be ignored.
  *
  * @type {string[]}
  */
 defaults.notifications_ignoredcategories = [];
 
 /**
  * Whether to show the developer tools panel.
  *
  * @type {boolean}
  */
 defaults.show_devtools_panel = true;
 
 /**
+ * Whether to suppress the first run page. This preference isn't
+ * set by the extension but can be pre-configured externally.
+ *
+ * @see https://adblockplus.org/development-builds/suppressing-the-first-run-page-on-chrome
+ * @type {boolean}
+ */
+defaults.suppress_first_run_page = false;
+
+/**
+ * Additonal subscriptions to be automatically added when the extension is
+ * loaded. This preference isn't set by the extension but can be pre-configured
+ * externally.
+ *
+ * @type {string[]}
+ */
+defaults.additional_subscriptions = [];
+
+/**
   * @namespace
   * @static
   */
 let Prefs = exports.Prefs = {
   /**
    * Fired when the value of a preference changes.
    *
    * @event
    * @property {string} pref The name of the preference that changed.
    */
@@ skipping 107 matching lines @@
           Prefs.onChanged._dispatch(pref);
         }
       }
     });
   }
 
   Prefs.untilLoaded = Promise.all([localLoaded, managedLoaded]).then(onLoaded);
 }
 
 init();