title: Instagram oAuth: "Invalid scope field(s)" (only using Firefox browser)
body: <p>I cannot get my access token for Instagram using <strong>Firefox</strong>. There is an error <code>&quot;Invalid scope field(s): public_content,follower_list&quot;</code>. But it works in other browsers like Google Chrome or Safari.</p>
  <p>I throw this URL from my web client <a href="https://www.instagram.com/oauth/authorize?client_id=CLIEND&amp;redirect_uri=https://MY_REDIRECT&amp;response_type=code&amp;scope=public_content+follower_list" rel="nofollow noreferrer">https://www.instagram.com/oauth/authorize?client_id=CLIEND&amp;redirect_uri=https://MY_REDIRECT&amp;response_type=code&amp;scope=public_content+follower_list</a>. <br>And looks like there is an encoding problem.
  From the Instagram documentation: <code>If you’d like to request multiple scopes at once, simply separate the scopes by a space</code>. <br>So, I've tried to use <code>public_content follower_list</code>, <code>public_content+follower_list</code>, <code>public_content%2Bfollower_list</code> but it  doesn't work in Firefox =\ <br>
  Any ideas? Thanks for advance!</p>