&brandShortName; Tools and Development

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# Web Development Tools

For web developers, &brandShortName; provides several tools to aid in developing and debugging Web applications. Some of these are optional installs. To access these tools, open the Tools menu and choose Web Development.

- Error Console: a console window that reports problems with JavaScript and CSS code in Web applications and the &brandShortName; application itself. By default, CSS parsing errors and JavaScript errors are displayed. The console can also be used to display logged messages from XUL and JavaScript code.
- DOM Inspector: a tool that can be used to inspect and edit the DOM of any web document or XUL application.

  Online resources:

  - Introduction to the DOM Inspector (Ian Oeschger)
  - DOM Inspector FAQ (mozilla.org)
  - Creating Applications with Mozilla - Appendix B3: The DOM Inspector
- JavaScript Debugger: also known as Venkman, this utility allows you to debug JavaScript in &brandShortName;. It supports stepping, breakpoints and many other features.

  Online resources:

  - Venkman JavaScript Debugger Homepage
  - Learning the JavaScript debugger Venkman (Svend Tofte)
  - Debugging JavaScript Using Venkman (webreference.com, article series)
  - Venkman Development Homepage

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