stronger domain matching using sdk/url

Closes #79

data/recommendation/localData.json

@@ -1,6 +1,6 @@
 [
   {
-    "domain": "wikipedia.org",
+    "domain": "www.wikipedia.org",
     "data": [
       {
         "description": "See previews of linked articles.",
@@ -13,7 +13,7 @@
     ]
   },
   {
-    "domain": "reddit.com",
+    "domain": "www.reddit.com",
     "data": [
       {
         "description": "Must-have enhancements for Reddit.",
@@ -39,7 +39,7 @@
     ]
   },
   {
-    "domain": "twitch.tv",
+    "domain": "www.twitch.tv",
     "data": [
       {
         "description": "Get instant alerts and quickly browse Twitch streams.",
@@ -60,7 +60,7 @@
     ]
   },
   {
-    "domain": "rt.com",
+    "domain": "www.rt.com",
     "data": [
       {
         "description": "Get the latest RT News with a single click.",
@@ -73,7 +73,7 @@
     ]
   },
   {
-    "domain": "facebook.com",
+    "domain": "www.facebook.com",
     "data": [
       {
         "description": "Enjoy enhanced access to Facebook emoticons.",
@@ -86,7 +86,7 @@
     ]
   },
   {
-    "domain": "amazon.com",
+    "domain": "www.amazon.com",
     "data": [
       {
         "description": "See price comparisons and manage your Amazon activity right from the toolbar.",

lib/Recommend.js

@@ -1,6 +1,7 @@
 const { AddonManager } = require('resource://gre/modules/AddonManager.jsm');
 const { Panel: panel } = require('sdk/panel');
 const self = require('sdk/self');
+const sdkUrl = require('sdk/url');
 const simplePrefs = require('sdk/simple-prefs');
 const simpleStorage = require('sdk/simple-storage');
 const tabs = require('sdk/tabs');
@@ -152,8 +153,9 @@ class Recommender {
   waitForWindow() {
     const win = tabs.activeTab.window;
     const button = this.getButton(win);
+    const tabHostname = sdkUrl.URL(tabs.activeTab.url).hostname; // eslint-disable-line new-cap
     for (let rec of simpleStorage.storage.recData) { // eslint-disable-line prefer-const
-      if (tabs.activeTab.url.includes(rec.domain)) {
+      if (tabHostname === rec.domain) {
         this.activeRecDomain = rec.domain;
         this.prepPanel(rec.data);
         this.telemetryLog.showButton(this.activeRecDomain);