Browser compatibility issues about firefox

[Ying]

（TELERIK MVC Grid）
  When you click the sort，firefox has a question。
  in firebug ,Browser execute  one post request, but background request execution twice。
  One Query all( data and record --all )， One Query filter( data and record  --filter)

  Chrome and IE no problem
  One Query filter( data and record  --filter)
 
  'telerik.ui.for.aspnetmvc.2014.2.716.trial' and 'telerik.ui.for.aspnetmvc.2014.3.1119.trial' have the same problem
   this is really a big problem