Official Gmail Blog: Tip: Set Gmail as your default email client in Firefox 3
For those of you using newly released Firefox 3, or willing to give it a try, you can take advantage of a new feature that lets you set Gmail as the default for all email links — those that contain “mailto:” in them. If you’re like me and don’t have a default email client set up, then clicking these links typically launches an installation wizard for a destkop mail client, or opens some email software that you don’t actually use.
Now you can configure Firefox to launch Gmail when you click on email address links and avoid the hassle.
Welcome to the Cutting Edge
The Web is all about innovation, and Firefox 3 sets the pace with dozens of new features, including the smart location bar, one-click bookmarking and blindingly fast performance.