The ability to “pin” tabs has been showing up in more web browsers these days, and it’s often a handy way to keep your ever-present favorite sites from taking up all the space in your tab bar. What’s often missing however is the information that is sometimes displayed in the title, such as GMail’s unread count. Lucky for us, Google has added a Labs feature to let you include the unread count in the page’s icon, so that you can pin the tab and still keep and eye out for fresh messages. Here’s how to enable it.
In the upper right corner of your GMail screen, there’s a beaker icon to enter the Labs section.
When Labs is open, search or scroll until you find Unread message icon, and enable it.
Sometimes, it’s the small things that make all the difference. Enjoy!