Improve: ignore analytics tracking in development

public/analytics.js

@@ -2,7 +2,3 @@
 (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
 m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
 })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
-
-ga("create", "UA-108816190-2", "auto");
-ga("set", "checkProtocolTask", null);
-ga("send", "pageview", "/");

src/index.tsx

@@ -1,14 +1,25 @@
 import React from "react";
 import { render } from "react-dom";
 import { App } from "./App";
-import { getRuntime } from "./utils";
+import { getRuntime, getEnv } from "./utils";
 import { AddressManager } from "./AddressManager";
 import { SettingsManager, Settings, DEFAULT_SETTINGS } from "./SettingsManager";
 
+//  inject NODE_ENV variable into window object
 window.__ENV__ = {
     NODE_ENV: process.env.REACT_APP_ENV as string,
 };
 
+//  initialize google analytics only in production
+if (getEnv() === "production") {
+    window.ga("create", "UA-108816190-2", "auto");
+    window.ga("set", "checkProtocolTask", null);
+    window.ga("send", "pageview", "/");
+} else {
+    console.info("Google Analytics disabled because runtime does not running in production.");
+    window.ga = function() {};
+}
+
 let settings = null;
 
 if (getRuntime() === "extension") {