The Assign to Category tab has always been slow for us but now we have 9000+ products it actually hangs the browser. The error in Firefox is: A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. Script: https://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js:3 Performance is similarly bad in IE and Chrome. Given we need to add several thousand more products soon, and thes