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The Web Developer extension adds various web developer tools to a browser. The extension is available for Firefox and Chrome, and will run on any platform that these browsers support including Windows, Mac OS X and Linux

The focus of this specification is readability and ease of access. Unlike the full HTML specification, this "web developer edition" removes information that only browser vendors need know.

Mobile devices such as smartphones and tablets usually have a capacitive touch-sensitive screen to capture interactions made with the user's fingers. As the mobile web evolves to enable increasingly sophisticated applications, web developers need a way to handle these events. For example, nearly any fast-paced game requires the player to press multiple buttons at once, which, in the context of a touchscreen, implies multi-touch. Apple introduced their touch events API in iOS 2.0. Android has been catching up to this de-facto standard and closing the gap. Recently a W3C working group has come together to work on this touch events specification. In this article I'll dive into the touch events API provided by iOS and Android devices, explore what sorts of applications you can build, present some best practices, and cover useful techniques that make it easier to develop touch-enabled applications.

"The following are some tips for decreasing your web page loading times."

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in HTML or XML (including various XML languages like SVG or XHTML). CSS is one of the core languages of the open web and has a standardized W3C specification. Developed in levels, CSS1 is now obsolete, CSS2.1 a recommendation and CSS3, now split into smaller modules, is progressing on the standard track. The first early drafts of CSS4 modules are being written.

"The float property is a valuable and powerful asset to any web designer/developer working with HTML and CSS. Tragically, it can also cause frustration and confusion if you don't fully understand how it works. Also, in the past, it's been linked to some pretty nasty browser bugs so it's normal to get nervous about using the float property in your CSS rule sets. Let's calm those nerves and ease that frustration."

Mobile Emulators & Simulators: The Ultimate Guide