Firefox Add-Ons for Web Developers
Firefox Add-on’s are small extensions that add new functionality to Mozilla Firefox. They can add new features, toolbars, and are completely customizable.
It is in a developers interest to peruse Firefox’s “Developer Tools” and “Website Integration” add-on categories to find extensions which fit your work style: https://addons.mozilla.org/firefox/
- Colorzilla – Advanced Eyedropper, ColorPicker, Page Zoomer, and other goodies.
- HTML Validator – Tidy for FireFox! Highly recommended for web developers. Let’s you check your page’s validation by doing a View / Page Source.
- MeasureIt – Provides a ruler to measure the width and height (in pixels) of any element on a webpage.
- View Formatted Source – Displays CSS being applied to each element. Great for debugging.
- View Source Chart – Tame tables and containers. Great for debugging.
- Web Developer – For HTML programmer/web programmer types. Has too many enormously useful functions to list (really!).
For developers focusing on IE, see the IE Tab and/or IE View":https://addons.mozilla.org/firefox/35/ add-ons to emulate IE functionality in Firefox.
See also, http://kb.ucla.edu/articles/view/what-are-firefox-add-ons-and-which-ones-are-the-best