title: Run script if on certain webpage
body: <p>I have a script that loads a music player but I only want to run it on my podcasts page. </p>
  
  <p>It should go something like <code>if window.location is example.com/podcasts then &lt;script&gt; blah &lt;/script&gt;</code> </p>
  
  <p>How can I do this? 
  Thanks!</p>