1. Define
1.1. Web Browsers: A software program that allows the user to find and read encoded documents in a form suitable for display, especially such a program for use on the World Wide Web.
1.2. Browser Extension (plugins): a computer program that extends the functionality of a web browser in some way.
2. Apple Safari 5
2.1. Pros
2.1.1. 1. Reading view.
2.1.2. 2. Reading list. Cover flow and other beautiful interface elements.
2.2. Cons
2.2.1. 1. Slow startup.
2.2.2. 2. Not being updated together with Mac version.
3. Opera 12.10
3.1. Pros
3.1.1. 1. Minimal interface.
3.1.2. 2. Turbo feature makes slow connections even faster. Built-in mail and Bittorrent clients.
3.2. Cons
3.2.1. 1. Occasionally sites won't display properly, though this is getting rare.
3.2.2. 2. Hardware acceleration not enabled by default
4. Marketshare
5. Chrome 27
5.1. Pros
5.1.1. Leading support for HTML 5. Fast.
5.1.2. 2.Instant site prediction and loading.
5.2. Cons
5.2.1. 1. Do Not Track privacy feature is buried and discouraged.
5.2.2. 2 Still some occasional minor site incompatibilities.
6. Mozilla Firefox 21
6.1. Pros
6.1.1. 1. Clean, minimal interface. Fast performance.
6.1.2. 2. Highly customizable. Good HTML5 support.
6.2. Cons
6.2.1. 1. Lacks client-side tracking protection like that found in IE9.
6.2.2. 2.Lacks Chrome's built in Flash and Instant page view. Slightly trails Chrome in HTML5 features.
7. Explorer 10
7.1. Pros
7.1.1. 1. Excellent touch input conveniences.
7.1.2. 2. Fast. High HTML5 compatibility
7.2. Cons
7.2.1. 1.Split personality on Windows 8? two very different interfaces.
7.2.2. 2. Still missing some HTML5 features.
8. HTML5
8.1. Pros
8.1.1. 1. HTML 5 will enable web designers to use cleaner, neater code, we can remove most div tags and replace them with semantic HTML 5 elements.
8.1.2. 2. Many new features and standards have emerged as part of HTML 5.
8.2. Cons
8.2.1. 1. Parts of the language are very stable, the language itself is considered a work in progress, so technically, any of the elements could change at any time.
8.2.2. 2. Only modern browsers support it.