Firebug 1.12.8

Web Development Evolved.

April 11, 2014
Windows (all)
2.2 MB
   (21 votes)

Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.

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

Your pages are taking a long time to load, but why? Did you go crazy and write too much JavaScript? Did you forget to compress your images? Are your ad partner's servers taking a siesta? Firebug breaks it all down for you file-by-file.

What's New:

  • New pref to disable/enable delayed Firebug load
  • Can't set error breakpoint for shallow error when "Show Stack Trace with Errors" isn't set
  • Style side panel doesn't display CSS rules after reload
  • Code completion suggestion popup misbehaves after switching from command line to command editor
  • Inline editing of cropped attribute values shows the cropped value
  • Firebug triggers Firefox crash on Ubuntu since the fix for issue 5427
  • Infotip broken for web fonts defined via data URLs or having a different case than their definition
  • Fonts are not displayed inside Style side panel
  • Cookies with UTF-8 values let all cookies disappear
  • Short tag of element rep treats class=" a" as having a class ""
  • Firebug command does not go away when disabled
  • Delete "" is broken