Add link tracking to site

github-pages/index.html

@@ -20,7 +20,7 @@ <h1 id="title">Wungle Text for Tumblr</h1>
       <p>Available on Firefox and Firefox for Android as an extension and as a userscript on chrome!</p>
 
       <div class="install-on">
-        <a href="https://addons.mozilla.org/en-US/firefox/addon/wungle-text-for-tumblr/">
+        <a href="https://addons.mozilla.org/en-US/firefox/addon/wungle-text-for-tumblr?utm_source=samolukadjo.github.io/wungle-text-for-tumblr&utm_medium=site&utm_content=install-button&utm_campaign=get-my-addons">
           <img src="get-the-addon-178x60px.png" alt="Get the Wungle Text for Tumblr extension for Firefox" />
         </a>
       </div>