This may not be important to you, but since a lot of people use Gmail but don’t read the Gmail blog, I thought I’d pass this on.
Basically, Title Tweaks changes the order of the elements in the browser title bar to put the more important things first. Once you turn on Title Tweaks from the Labs tab under Settings, your browser title bar will display something more like “Inbox (3) – Gma…”.
The real advantage is that you can see if you’ve received that important email (new forum registration) without having to switch windows or tabs. More importantly, it’s not as in-your-face like some recent Labs features – Multiple Inboxes anyone? OK, to be fair, the Multiple Inboxes Lab is good and probably well overdue but its not for everyone and its a pretty dramatic change to the Gmail experience.