Yahoo! browser has reached end of life and is no longer supported since technical updates are not being made for the browser. As a result, functionality and quality will degrade over time. We would request you to use AT&T supported browsers like Internet Explorer, Mozilla Firefox or Safari.
The newer supported browsers have updated tools and security features that will make your AT&T Internet browsing experience even better.
The link given below would provide additional information. You can download Internet Explorer optimized for AT&T powered by Yahoo! from the help article.