Just like how you can change the homepage in any web browser,Mozilla Thunderbird also allows you to choose a webpage to show in the message viewing area when it starts.This could be useful,you could make it show a news website and see the news.Then, when you click a link,Mozilla Thunderbird opens the link in your default web browser.
Thunderbird can be obtained from www.mozillamessaging.com/en-US/thunderbird/all.html
Step 1: Open the Options Menu
Go to Tools>Options.It is at the very bottom of the menu.
Step 2: Change the Field
Step 3: Done
This is so simple,I'll integrate it into some other computer-related instructable I post.Until then,enjoy this Instructable and this simple method.