title: Backspace doesn't delete inner html tags of a contenteditable DIV in Firefox
body: <p>I have created a DIV with attribute <code>contenteditable=true</code> and appended children like <code>span</code> and <code>a</code> with attributes <code>contenteditable=false</code>. </p>
  
  <p>Wanted to test if the entire node be deleted with a single backspace and to my surprise Firefox couldn't delete the elements. </p>
  
  <p>Also, this works as expected in all major desktop browsers except Firefox. <br>
  Any clues on this or what could be the possible workaround?</p>
  
  <p>Found the exact issue on bugzilla <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=439808" rel="nofollow noreferrer">here</a>.  </p>