title: onmozfullscreenchange warning in Firefox (not using react)
body: <p>I keep getting this error in Firefox console.</p>
  
  <pre><code>onmozfullscreenchange is deprecated. editresume.js:411:4
  onmozfullscreenerror is deprecated. editresume.js:411:4
  Ignoring get or set of property that has [LenientThis] because the “this” object is incorrect.
  </code></pre>
  
  <p>If I go to my code file, for that line number, this is what I have</p>
  
  <pre><code>tempbutton.setAttributeNode(attid);
  </code></pre>
  
  <p>and, I am not using onmozfullscreenchange or onmozfullscreenerror anywhere.</p>
  
  <p>Why am I getting this? It is also triggers a debugger exception for some reason, at that line number.</p>
  
  <p>Note : I dont get a similar error/warning/breakpoint trigger on Chrome. So, its Firefox only. </p>
  
  <p>Firefox version - 70.0
  Chrome version - 77.0.X</p>