setup google analytics with pageview tracking

src/scripts/analytics.js

@@ -0,0 +1,26 @@
+var gaUtils = chrome.extension.getBackgroundPage().utilsService,
+    gaTrackingId = null;
+
+if (gaUtils.isChrome()) {
+    gaTrackingId = 'UA-81915606-6';
+}
+else if (gaUtils.isFirefox()) {
+    gaTrackingId = 'UA-81915606-7';
+}
+else if (gaUtils.isEdge()) {
+    gaTrackingId = 'UA-81915606-9';
+}
+else if (gaUtils.isOpera()) {
+    gaTrackingId = 'UA-81915606-8';
+}
+
+if (gaTrackingId) {
+    ga('create', gaTrackingId, 'auto');
+}
+
+// Removes failing protocol check. ref: http://stackoverflow.com/a/22152353/1958200
+ga('set', 'checkProtocolTask', function () { });
+
+if (typeof isBackground !== 'undefined') {
+    ga('send', 'pageview', '/background.html');
+}