Flock is a web browser that is based upon Mozilla Firefox and other solutions from Mozilla. The developers from Flock call it a "social browser", due to the special features included in it, mainly those for interacting with social networking web services, such as Flickr, Del.icio.us, Technorati and some popular blogging and news aggregation services. Although you could say it's a relative of Firefox, it has many features that separate it from Mozilla's browser.
The developers from Flock thought you should have a customized homepage, called "My World". You can keep it as your homepage – which I think is a good solution – or you can transform it into your own information portal with search engines, news, multimedia items and much more.
If you have accounts open on any social networking websites (media sharing, blogging etc.) like Youtube, Wordpress.com, Xanga etc. or a self-hosted blog, you can access them directly from the "Accounts and Services" button on the My World page. This will open a sidebar, from which you can select yours. If you don't have an account created on any of these websites, then you can make one very easy with Flock. You only have to click on one of the items listed in the sidebar, and a wizard will help you create the user account on any of them.
To make things even easier, Flock will remember your blog, after you visit it. The browser will automatically add the feeds related to it in "Favorite Feeds", even though you don't want that. But you can always delete them afterwards.
An interesting feature that I haven't seen in other browsers, is the "Web Clipboard". What can you do with it? Here you can add text and images so you can use them later. You can do this very quickly and in a simple manner, by using the drag and drop technique. If you find any interesting images or text on your travels in the vast realm of the Internet, you can just drag and drop 'em in the toolbar. After you've finished using them, the browser lets you delete them one by one or all at the same time.
You can download Flock here.