Flock Download
Flock is a web browser based on Mozilla technologies and the name of the company developing the web browser. Flock's creators call it a "social browser", meaning it is able to interact with popular social web services. Such web services include Flickr (photo sharing), Del.icio.us (bookmark sharing), Technorati, blogs and news aggregation, sometimes collectively called Web 2.0.
Pros:
Flock seems to be similar to Firefox but lacks its stability and security features. If you get bored with Firefox, Flock is the right choice. It’s fully compatible with Firefox add-ons and brings good social networking capabilities .