Sparky and FF - Do not write Class

Welcome. I'm using Windows 8 and Mozilla Firefox. On the Layot Builder do not have the active window class. I can not write anything there. I should add that Internet Explorer does not have this problem.
Sorry for my english, but I'm using Google Translator.
Regards
Alexander

Edit (13:08):
On a computer with Windows XP and Firefox is the same.

open

templates/sparky/js/tadmin.js

add this at very bottom:

jQuery(document).ready(function(){
if(jQuery.browser.mozilla){
setTimeout(function(){
jQuery('.LayoutModel *').enableSelection();
},500);
}
})

Thank you very much. The problem has been removed.

I see this problem in Hot Gaming Zone template - I tried to edit tadmin but it is still the same problem.

Windows XP with Firefox

Solution from post #23656 should sole it for FF , maybe you just need to refresh browser cache to load modified .js file (ctrl+F5 several times).

School boy error :laugh: Fixed as described - Thanks