The Trademark Electronic Application System (TEAS) is a web-based application that works with Microsoft Internet Explorer (IE) 9+, FireFox 5+, Safari 5+, and Google Chrome 13.0.
While the USPTO does not specifically endorse these web browser products, these are the browsers that support various TEAS features, namely, frames, JavaScript, SSLv3, TLSv1, and file upload. If your browser does not meet, or exceed the required standards, you may acquire these web browsers at:
Steps to enable JavaScript
How to enable JavaScript in Microsoft Internet Explorer
How to enable JavaScript in Safari