Firefox

W:Mozilla Firefox is a graphical web browser developed by the Mozilla Corporation, and a large community of external contributors. Firefox, officially abbreviated as Fx or fx and popularly abbreviated FF, started as a fork of the Navigator browser component of the Mozilla Application Suite. Firefox has replaced the Mozilla Suite as the flagship product of the Mozilla project, under the direction of the Mozilla Foundation.

Firefox Extensions

• Download Helper - download videos from youtube and other online video content sites
  • Fast Video Downloader - an alternative downloader
• Firebug
• Remove it permenantly - remove ads and thing from sites you don't want to see!
• Selenium IDE
• XPath checker

Firebug tutorials

• Documentation
• Firebug tutorial
• introduction to Firebug
• An In-depth Look At The Future of Javascript Debugging With Firebug
• Firebug Internals

Videos

• 14 min Tutorial
• Joe Hewitt highlights
• Excellent overview
• Tutorials
  • Debugging AJAX Application with Firebug
  • CSS editing using Firebug

Logging functions

• console.log(variable);
• console.log("The value of StringVariable is %s, StringVariable);
• console.info(variable);
• console.warn(variable);
• console.error(variable);
• debugger; # Breaks execution at debugger point -Select Options → Break on errors
• console.time("UNIQUE ID");
• console.timeEnd("UNIQUE ID");