Allowing insecure content in Chrome or Firefox not working, Google API Explorer
<p>Trying to use Google's API Explorer to test Cloud Endpoints.</p>

<p>I get this error in console after seeing that nothing loads:</p>

<blockquote>
  <p>Mixed Content: The page at
  '[https :// ] apis-explorer.appspot.com/apis-explorer/?base=http%3A%2F%2Flocalhost%3A8080%2F_ah%2Fapi#p/'
  was loaded over HTTPS, but requested an insecure resource
  '[http :// ]localhost:8080/<em>ah/api/static/proxy.html?jsh=m%3B%2F</em>%2Fscs%2Fapps-s…3DEQ%2Frt%3Dj%2Fd%3D1%2Ft%3Dzcms%2Frs%3DAGLTcCOS-9qNfJHxVBVUBVsRh4QjbpbBLw'.
  This request has been blocked; the content must be served over
  HTTPS.zk @
  apis.google.com/<em>/scs/apps-static/</em>/js/k=oz.gapi.en.CHA8zxoicJQ.O/m=client/…=1/am=EQ/rs=AGLTcCOS-9qNfJHxVBVUBVsRh4QjbpbBLw/t=zcms/cb=gapi.loaded_0:159</p>
</blockquote>

<p>I've tried the following suggestions, and they do not work:</p>

<ol>
<li>In chrome, click on the shield in the upper right corner to 'load unsafe scripts' - now we are in http instead of https, but above error still shows</li>
<li>In firefox, click on the lock on the upper left to 'disable protection for now' - now in http as well but still no luck</li>
<li>Followed the instructions here: <a href="https://developers.google.com/explorer-help/#hitting_local_api" rel="nofollow">https://developers.google.com/explorer-help/#hitting_local_api</a> Doesn't seem to fix the issue either.</li>
</ol>

<p>Will try any suggestions. Thank you in advance.</p>