If you use Yahoo! and Firefox try out this extension. Preview your messages with a single click. It adds AJAX support to the Yahoo! mail. If you use Yahoo! mail just try it out. You can read more about it at Viamatic Firefox Extensions
- Preview your messages without leaving your inbox. Adds a small "plus sign" next to your email list. Click on the "plus sign" to preview the message.
- Send back messages with a single click using Instant Reply
- Download any attachment with a single click