make use of chrome.runtime instead of spawning a tab

base/popup/popup.js

@@ -3,16 +3,9 @@ function restore_options() {
         if(result && result.baseURL.startsWith('http')) {
             document.getElementById('open-stammtv').href = result.baseURL;
         } else {
-            openSettings();
+            chrome.runtime.openOptionsPage();
         }
     });
 }
 
-function openSettings() {
-    chrome.tabs.create({
-        active: true,
-        url: 'settings/settings.html'
-    }, null);
-}
-
 document.addEventListener('DOMContentLoaded', restore_options);

base/script.js

@@ -1,3 +1,5 @@
+chrome.contextMenus.onClicked.addListener(addToStammTV);
+
 let WEBSOCKET_URL = "";
 let websocket;
 const CONTEXT_MENU_ID = "STAMMTV_ADD_URL_TO_PLAYLIST";
@@ -5,7 +7,7 @@ const CONTEXT_MENU_ID = "STAMMTV_ADD_URL_TO_PLAYLIST";
 chrome.storage.local.get('firstRun', function (result) {
     if (result.firstRun === false) {
         chrome.storage.local.set({'firstRun': false}, function (result) {
-            openSettings();
+            chrome.runtime.openOptionsPage();
         });
     } else {
         chrome.storage.local.get(['baseURL', 'wssURL'], function (items) {
@@ -13,19 +15,12 @@ chrome.storage.local.get('firstRun', function (result) {
                 WEBSOCKET_URL = items.wssURL;
                 init();
             } else {
-                openSettings();
+                chrome.runtime.openOptionsPage();
             }
         });
     }
 });
 
-function openSettings() {
-    chrome.tabs.create({
-        active: true,
-        url: 'settings/settings.html'
-    }, null);
-}
-
 function init() {
     chrome.contextMenus.removeAll(function() {
         chrome.contextMenus.create({
@@ -34,8 +29,6 @@ function init() {
             id: CONTEXT_MENU_ID
         });
     });
-
-    chrome.contextMenus.onClicked.addListener(addToStammTV);
 }
 
 function parseYoutubeURL(url) {