CSS Checker JetPack Extension

Project Name

CSS Checker JetPack Extension 0.1

Project Description

CSS as a standard evolves more slowly than browser vendor implementations, and as such, browser extensions are created. For example: -moz-box-shadow (Mozilla only), -webkit-box-shadow (Chrome/Safari), box-shadow (CSS standard). This extension will allow the user to tell when a a -webkit-* extension is being used for which there is also a -moz-* version. This will help with finding compatibility issues on websites that appear to work in one browser and not another.

Resources

• Vendor Specific Extensions:

1. http://www.w3.org/TR/CSS21/syndata.html#vendor-keywords

• JetPack SDK

1. https://jetpack.mozillalabs.com/
2. IRC in #jetpack on irc.mozilla.org

• Gecko Layout Engine

1. https://developer.mozilla.org/en/Gecko

• Mozilla CSS Extensions

1. https://developer.mozilla.org/en/CSS_Reference/Mozilla_Extensions

• WebKit Layout Engine

1. http://webkit.org/

• Webkit CSS Extensions

1. http://trac.webkit.org/browser/trunk/WebCore/css/CSSPropertyNames.in
2. http://trac.webkit.org/browser/trunk/WebCore/css/CSSValueKeywords.in

Project Leader(s)

• Konstantin Novichikhin

Project Contributor(s)

• Dave Humphrey

Project Details

Release 0.1 The extension is based on JetPack SDK and packaged as standard FF extension in a xpi archive.

The way it works: On tab load, it will parse page style sheets all the way down to X CSS properties. It will then get that CSS property selector and convert it to xpath. Firefox xpath evaluator interface will then build a list of matching DOM elements. The problem right now is to get webkit properties from style sheet, since those are ignored by Firefox nsCSSScanner.

Project News

• 0.1 Release
• GitHub Repo
• 0.2 Release
• 0.3 Release - UI, Rewriting of 0.1 and 0.2
• 0.3.1 Release - Rewriting of 0.1 and 0.2, Updates for Add-on SDK 1.0