1. Mozilla Firefox 21
1.1. Pros
1.1.1. 1: Clean, minimal interface. Fast performance. Innovative tab implementation.
1.1.2. 2: Highly customizable. Good HTML5 support. Good security.
1.2. Cons
1.2.1. 1: Lacks client-side tracking protection like that found in IE9.
1.2.2. 2: Lacks Chrome's built in Flash and Instant page view. Slightly trails Chrome in HTML5 features.
2. Explorer 10
2.1. Pros
2.1.1. 1: Fast. High HTML5 compatibility.
2.1.2. 2: Excellent touch input conveniences. Full-screen view.
2.2. Cons
2.2.1. 1: Split personality on Windows 8? two very different interfaces.
2.2.2. 2: Still missing some HTML5 features.
3. HTML5 Readiness
4. Marketshare
5. Definitions
5.1. Browser: A web browser (commonly referred to as a browser) is a software application for retrieving, presenting and traversing information resources on the World Wide Web.
5.2. Browser Extension: A browser extension is a computer program that extends the functionality of a web browser in some way. Depending on the browser and the version, the term may be distinct from similar terms such as plug-in or add-on.
6. Google Chrome 27
6.1. Pros
6.1.1. 1: Leading support for HTML 5.
6.1.2. 2: Fast. Hardware acceleration. Excellent security.
6.2. Cons
6.2.1. 1: Do Not Track privacy feature is buried and discouraged.
6.2.2. 2: Still some occasional minor site incompatibilities.
7. Apple Safari 5
7.1. Pros
7.1.1. 1: Reading view. Reading list. Cover flow and other beautiful interface elements.
7.1.2. 2: Built-in RSS reader. Good standards support. Good browsing speed.
7.2. Cons
7.2.1. 1: Slow startup. Not being updated together with Mac version.
7.2.2. 2: No hardware acceleration for Windows.
8. Opera 12
8.1. Pros
8.1.1. 1: Fast, feature rich, cross platform support, tab stacking, web standard compliant
8.1.2. 2: Built in mail & torrent client, extension & themes support, visual tabs & mouse gestures.
8.2. Cons
8.2.1. 1: Extension gallery not so extensive, no standard shortcut keys.
8.2.2. 2: Extension gallery not so extensive, no standard shortcut keys.