“Every time you launch Thunderbird, you are greeted by a generic
start page (unless you’ve turned that option off). Most of us don’t
pay much attention to it and navigate straight to the Inbox without
giving it a second thought. The start screen is just a simple HTML
page, which Thunderbird fetches from the address specified in the
application’s preferences. Knowing that, you can replace it with
something more useful, such as the URL of your Web site or blog —
or you can take it a step further and turn the start screen into a
tool that can help to manage your ideas, notes, to-do lists, and
more…”