Issue 4612 - enable AA on first run and make automatic adding of any subscription optional

lib/init.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 33 matching lines @@
     if (FilterStorage.firstRun)
     {
       // No data, must be a new user or someone with corrupted data - initialize
       // with default settings
 
       let {Subscription, DownloadableSubscription} = require("subscriptionClasses");
       let {Synchronizer} = require("synchronizer");
       let {Prefs} = require("prefs");
       let {Utils} = require("utils");
 
-      // Choose default subscription and add it
-      let subscriptions = require("subscriptions.xml");
-      let node = Utils.chooseFilterSubscription(subscriptions);
-      if (node)
+      if (Prefs.first_run_subscription_auto_select)
       {
-        let subscription = Subscription.fromURL(node.url);
-        FilterStorage.addSubscription(subscription);
-        subscription.disabled = false;
-        subscription.title = node.title;
-        subscription.homepage = node.homepage;
-        if (subscription instanceof DownloadableSubscription && !subscription.lastDownload)
-          Synchronizer.execute(subscription);
+        let subscriptions = require("subscriptions.xml");
+        let node = Utils.chooseFilterSubscription(subscriptions);
+        if (node)
+        {
+          let subscription = Subscription.fromURL(node.url);
+          FilterStorage.addSubscription(subscription);

[Felix Dahlke, 2016/11/22 17:37:16]

Nit: Seems we do this after setting the subscription properties in ABP for
Chrome. I guess we don't have to do it the same way, but it makes a bit more
sense to me that way: First create the subscription object, then set its
properties, then add it to FilterStorage, then synchronize it.

[sergei, 2016/11/23 14:20:50]

Completely agree, fixed.

+          subscription.disabled = false;
+          subscription.title = node.title;
+          subscription.homepage = node.homepage;
+          if (subscription instanceof DownloadableSubscription && !subscription.lastDownload)
+            Synchronizer.execute(subscription);
+        }
+        let aaSubscription = Subscription.fromURL(Prefs.subscriptions_exceptionsurl);

[Felix Dahlke, 2016/11/22 17:37:16]

Nit: Mind adding an empty line above this to separate ad blocking and AA here?
Would make it a bit easier to read IMO.

[sergei, 2016/11/23 14:20:50]

Done.

+        FilterStorage.addSubscription(aaSubscription);
+        aaSubscription.disabled = false;
+        if (aaSubscription instanceof DownloadableSubscription && !aaSubscription.lastDownload)
+          Synchronizer.execute(aaSubscription);
       }
     }
 
     filtersInitDone = true;
     checkInitialized();
   }
 });