Firebug is a popular and essential add-on for web developers who work with Firefox. Firebug brings to Firefox a wealth of development tools that you can use while browsing.
The Firebug addon is cross-platform and it works on Mac OS X, Windows and Linux.
Here are some key features of "Firebug":
Always at your service:
· Firebug is always just a keystroke away, but it never gets in your way. You can open Firebug in a separate window, or as a bar at the bottom of your browser. Firebug also gives you fine-grained control over which websites you want to enable it for.
Inspect and edit HTML:
· Firebug makes it simple to find HTML elements buried deep in the page. Once you've found what you're looking for, Firebug gives you a wealth of information, and lets you edit the HTML live.
Tweak CSS to perfection:
· Firebug's CSS tabs tell you everything you need to know about the styles in your web pages, and if you don't like what it's telling you, you can make changes and see them take effect instantly.
Visualize CSS metrics:
· When your CSS boxes aren't lining up correctly it can be difficult to understand why. Let Firebug be your eyes and it will measure and illustrate all the offsets, margins, borders, padding, and sizes for you.
Monitor network activity:
Quickly find errors:
Explore the DOM:
· Firefox 17.0 and later
What's New in This Release: [ read full changelog ]
Use in Command Line (issue 6422):
· This feature allows referring various objects from the command line using new $p variable.
Precision for Console API %f log pattern (issue 6439):
· Floats can be rounded by using the %.xf pattern inside the first console.log() argument. Here x denotes the number of decimal places the number should be rounded to.