title: css background images doesn't show in Web developer in toolbar > Edit css
body: <p>I'm working on a xhtml css locally. </p>
  
  <p>Why css background images doesn't show in Web developer toolbar > Edit css option?</p>
  
  <p>Is there any workaround for it?</p>
  
  <p>Has anyone faced this issue or I should reinstall firefox and plugin?</p>