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Send messages to the console direct from your webpage through Javascript.
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Measure your Javascript performance in the Console's Profiler.
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Step-by-step interactive debugging in a visual environment.
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Look at detailed measurements of your site's network activity.
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Tweak and position HTML elements with CSS and the Layout panels.

Recent news

Firebug 1.10a1

getfirebug.com has Firebug 1.10a1

Firebug 1.10a1 is compatible with Firefox Nightly.

Firebug 1.9 is out of the door and FWG is hardworking to further improve Firebug. We have already got a list of things we would like to focus on in 1.10. Take a look at Firebug Roadmap and let us know what would be your wish list or what you think should be the priorities. We are also looking for developers who would like to be part of FWG and help Firebug to grow!

Since AMO site doesn’t support alpha channels all alpha releases will be available only on getfirebug.com

Firebug 1.10a1 fixes 9 issues.

Some issues reported after 1.9.0 release last week have been already fixed and patches are included. If we get positive verifications they will be back-ported into 1.9

Couple of highlights from this release:

  • Firefox tab bar is not affected by Firebug any more (only Mac related, issue 3442)
  • It is possible to delete CSS rule with all its properties. Just right click on its name and pick Delete (issue 5000)

Please post feedback in the newsgroup, thanks.

Jan ‘Honza’ Odvarko

Firebug 1.9.0

Firebug Working Group (FWG) is proud to announce the final Firebug 1.9 release!

Firebug 1.9 has been uploaded to AMO (but it can take some time to go through caches).

Compatibility

  • Firefox 4.0 with Firebug 1.7.3
  • Firefox 5.0 – 11.0 with Firebug 1.9
  • Firefox 12.0 (nightly) with Firebug 1.10 alpha

Firebug 1.10 alpha 1 will be available next week, you can use Firebug 1.9b6 for Firefox nightlies in the meantime.

Feature Enhancements

Check out detailed description of all enhancements with screen-shots. There are also releases notes with links to proper issue reports available on Firebug Wiki.

  • Firebug UI docking
  • Copy JSON responses to the clipboard
  • Syntax error position displayed
  • New column in the Net panel: Protocol
  • Quickly Remove Elements from the page
  • Function objects: displayName property
  • Every Console log has its origin info
  • Resend HTTP request
  • Tooltip for conditional breakpoints
  • Add Watch from the DOM panel
  • Response Headers from the browser cache
  • Font Viewer
  • Font Tooltip
  • Tooltip tip for array items

Please post feedback in the newsgroup, thanks!

Jan ‘Honza’ Odvarko

Firebug 1.9b5

Firebug 1.9b5 has been released (compatible with Firefox 5-12).

Firebug 1.9b5 fixes 11 issues.

A problem with HTML edit (issue 5058) is fixed in this release.

This should be the last Firebug 1.9 beta. In case there are no critical problems or blockers found, we’ll release Firebug 1.9 final in January.

Happy firebugging!

Post feedback in the newsgroup, thanks!

Jan ‘Honza’ Odvarko

Read more blog posts on the Firebug weblog »