Want to add information rich profiles to Gmail? Then you need the Rapportive add-on for Firefox. This great add-on will allow you to see what people look like, where they are based, a few of their interests and social network profiles on LinkedIn, Facebook, Twitter and more.
Here is a little more information about Rapportive from the developers:
Rapportive shows you everything about your contacts right inside your inbox.
You can immediately see what people look like, where they’re based, and what they do. You can establish rapport by mentioning shared interests. You can grow your network by connecting on LinkedIn, Twitter, Facebook and more. And you can record thoughts for later by leaving notes.
Imagine relationship management built into your email. For free.
Sound interesting? You can pick up Rapportive for Firefox from the Firefox Add-ons website.