These are Firefox 3 compatible addons that extend the use of Gmail on Firefox.

• Better Gmail 2
• A compilation of the best Greasemonkey Gmail enhancements in one extension.
  

• GMail Checker
• Notifies new messages of your Gmail and Google Apps account.

• Gmai Notifier
• A notifier for Gmail accounts.

• Gmail Manager
• Alows you to manage multiple Gmail accounts and receive new mail notifications.

• Webmail Notifier



• WebMail Notifier checks your webmail accounts and notifies the number of unread emails.
  

• Blank Canvas Gmail Signatures
• Automatically inserts HTML signatures into your Gmail messages based on which address you are sending from.