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

Recent news

Firebug 1.12 alpha 8

getfirebug.com has Firebug 1.12 alpha 8

Firebug 1.12a8 fixes 11 issues
Firebug 1.12a8 is compatible with Firefox 21-24

 

Some highlights from this release

  • Multiple filters selectable in the Net panel (issue 4156)
  • Multiple filters can be set at the same time by holding down Ctrl while clicking the filter buttons.

    Multiple filters selected in the Net panel

     

  • Multiple filters selectable in the Console panel (issue 4621)
  • Just like in the Net panel, the Console panel also supports multiple filters being selected at the same time.

    Multiple filters selected in the Console panel

     

  • Store the result of the last command line evaluation in $_ (issue 6519)
  • There is a new variable available in the Command Line: $_

    This variable stores the result of the previous expression evaluation (compatible with Chrome dev tools).

 

Please post feedback in the newsgroup, thanks

Jan ‘Honza’ Odvarko

 

Firebug 1.12 alpha 7

getfirebug.com has Firebug 1.12 alpha 7

Firebug 1.12a7 fixes 8 issues
Firebug 1.12a7 is compatible with Firefox 21-24

 

Some highlights from this release

  • Group Console Messages (issue 4979)
  • Console messages are grouped now in case the messages appear multiple times consecutively. This feature can dramatically decrease number of logs and make the entire logging easier!

    Grouped Logging
    The number on the right side tells how many logs is grouped in the log.

     

  • Create selector groups for Elements side panel (issue 5955)
  • Multiple selector trials are now shown as foldable groups of elements. These groups persist on page reloads and are dynamically updated when the page changes.

    Selector Groups

     

  • Issue 6447: Improve display of timings in net request infotip (issue 6447)
  • The tooltip for individual HTTP requests displayed in the Net panel has been improved. It displays all phases of the current request as a little waterfall graph. And so, it’s now a lot easier to understand the timing.

    Net panel tooltip

 

Please post feedback in the newsgroup, thanks

Jan ‘Honza’ Odvarko

 

Firebug 1.11.4

Firebug 1.11.4 has been released (archive).

Firebug 1.11.4 fixes 4 issues
Firebug 1.11.4 is compatible with Firefox 17-22
 

All users subscribed to AMO beta channel should be already updated to version 1.11.4 beta 1 which is exactly the same as 1.11.4.

 

This version is a follow-up for 1.11.3 and fixes some reported problems. Specifically XHR Spy works again for Firefox 17 and CSS pseudo-element rules are now properly displayed in the Style panel.

 

Please post feedback in the newsgroup, thanks!

Jan ‘Honza’ Odvarko

 

Read more blog posts on the Firebug weblog »