Dont worry boy help is here download this addon

Code: 
https://addons.mozilla.org/en-US/firefox/addon/11561/


It will appear at the right bottom of your browser after installed. Go to megaupload file manager page and click on the icon at the bottom right with "R" mark and there u go sort it, invet it do whatever u like. Before doing that go to option by right clicking on "R" mark and uncheck the final result windows time out. i hope this will solve your problem.