Others Online Toolbar is a Firefox Extension that helps you discover people relevant to your Web browsing and other interests. It follows that others who visit the same page probably have some common interest.

As you browse, Others Online Toolbar plays a major role in searching people with the same interest in the web page you are interested in. It lets you see when related people are available online and you can connect with them by email or IM.

With Others Online Toolbar, you can see what others are reading, blogging, searching, and shopping for the same sort of stuff you are. You can chat with a person regarding a topic, read a review on his blog, exchange opinion, link and more.

Others Online features:

• Identity protection - You can be anyone you want to be, and you only need a username and password to use the service. The only personally identifiable information we ask for is your email address, but at no time do we reveal it.
• Chat and Email - we broker all communications so that your personal IM and email address is not revealed. When a user “chats you up”, we show you the interests you have in common, and you may “block” users at any time.
• Blocking users - once you “block” a user, you will no longer see each other’s profiles, nor will they be able to communicate with you.
• Favorites - Have a favorite user? Add them to your favorites list and they’ll always be there (regardless of matching interests).
• Tabs - We use tabs to show you people with shared interests globally and locally (within 50 miles of you). Very soon we’ll add tabs to show you people within your favorite online communities, such as MySpace, Bebo, LiveJournal, etc. We’ll even let users define their own tabs!
• Sign in/out - When you’re signed in, you see others and they see you, but only when your interests match. When you sign out, you’re “offline” and the toolbar stops all interaction with our server.
• Profiling - We analyze the Web pages you view (only when you’re signed in) in order to show you the most relevant profiles. The more we know about your interests, the better we’ll be at matching you with other users. That said, you have 100% control over your profile.
• Adult content - Users with Adult-oriented Web sites will only be shown within the Adult tab, which is only available to those 18 or older.

Others Online Toolbar is free, you can download it from Others Online site or Mozilla Add-Ons site.