显示 Google Mail 收件箱中的未读邮件数。点击该按钮还可以打开您的收件箱。
An improvement upon the Google Mail Checker extension: plays a notification sound when new, unread e-mails are fetched. In addition, displays the number of unread e-mail messages within the extension's icon. Clicking on the extension icon will open your e-mail list.
