1. Google Chrome
1.1. Pros:
1.1.1. Click on "Chrome Web Store" when you open a new tab to check out all the Web-based apps you can subscribe to or try out for free.
1.1.2. New search feature, Instant, that shows you web pages as you type and tries to predict just what you're looking for.
1.2. Cons:
1.2.1. Some people don't like the lean interface
1.2.2. Chrome is not for everyone. Firefox users may miss the functionality of some of their favorite add-ons.
2. Mozilla Firefox
2.1. Pros:
2.1.1. The "awesome bar" feature combines the search and address boxes together along with your bookmarks and browsing history in a way which magically does a great job of figuring out want to do next.
2.1.2. The richness and diversity of add-ons makes Firefox the most powerful and flexible browser.
2.2. Cons:
2.2.1. The sub-optimal interface is only a drawback, so you must be willing to spend some time customizing
2.2.2. Can get distracted by the bright orange menu-access button and tabs can strike you as too boxy and wide.
3. Explorer
3.1. Pros:
3.1.1. It is much faster on graphics-intensive sites that can take advantage of hardware acceleration.
3.1.2. Tabs are now separate processes, benefiting security and performance.
3.2. Cons:
3.2.1. To use the full power of IE9, users must learn how to use the extra features like Web Slices and Accelerators.
3.2.2. Only works on about 1/3 of all computers.
4. Apple Safari
4.1. Pros:
4.1.1. Bundled with all new MAC systems. The pretty interface blends in well with the overall look and feel of MAC.
4.1.2. Simple and easy to use.
4.2. Cons:
4.2.1. Lacks distraction-blocking full screen mode.
4.2.2. Not quite as fast as the latest versions of the other 4 browsers.
5. Opera
5.1. Pros:
5.1.1. Supports many forms of customization through third party add ons, including plug ins, skins, panels, as well as separate applications called widgets.
5.1.2. Already comes bundled with many extras that users typically want, such as ad blocking, note taking, and various tab features.
5.2. Cons:
5.2.1. Some websites don't work flawlessly.
5.2.2. Very fast when starting, but quickly overloads and then gets progressively slower.