actionscript 3 - AS3 MouseMove laggy issue with transparency on FireFox -

i'm using custom cursor when hovering movieclip using mouse_move

spectrum.addeventlistener(mouseevent.mouse_move,function(e:mouseevent):void{             mouse.hide();             mousecursor.visible = true;             mousecursor.startdrag(true);             mousecursor.mouseenabled = false;             mousecursor.mousechildren = false;             e.updateafterevent(); }); 

when set wmode='transparent'

mouse_move still works smoothly on chrome , ie, on firefox cursor becomes super laggy when hovering movieclip..any ideas why?

i tried enterframe custom cursor, it's laggy..

if set wmode ='window' mouse_move works again, , not laggy anymore..

why mousemove become laggy when setting wmode='transparent' on firefox ? can me ?

i'm not sure problem wmode = transparent!

rather starting drag, should rather either start once , stop when dont need anymore

or

just set cursors position rather using drag.

    spectrum.addeventlistener(mouseevent.mouse_move,function(e:mouseevent):void{         mouse.hide();         mousecursor.visible = true;         mousecursor.mouseenabled = false;         mousecursor.mousechildren = false;         mousecursor.x = mousex;         mousecursor.y = mousey; 

});