Windows 7. This happens on every website that uses a file input box to upload images/files. I click browse. Select a file and click 'open' in the file browser window. Then firefox seems to hang or pause for anything between 5-12 seconds, after this time the file name appears in the file input field - you can't interact with the browser at all during this time. Can be reproduced every time i run firefox - does not happen in I.E or any other browser on this machine.