Chrome and Firefox: Fans of Gmail tweakers like previously mentioned Better Gmail and its Chrome counterpart, Minimalist Gmail, will love the newest addition to Gmail Labs, in which you can show your unread count in your Gmail tab’s icon.
Many of us have been taking advantage of Chrome and Firefox’s Pin Tab feature, which shrinks the tab down to just a small icon. The one problem with Gmail is that it hides your unread count from the tab—not that it was that easy to see in the first place. New Gmail Lab Unread Message Icon will show you how many unread messages you have right from Gmail’s favicon in your browser tab, so you can tell at a glance whether you have email to check or not.
To turn it on, just hit up Gmail Labs and enable Unread Message Icon. Note that it only works in Chrome and Firefox for right now.
New in Labs: Unread Message Icon [Official Gmail Blog]