Firebug 1.5 Release Notes – FirebugWiki

DOM

• Break on Object Change

Net

• Break on Next XHR
• More accurate timing using Network Activity Observer
• Added Persist button
• XHR Breakpoints
• Network info header and column customization
• XML Response Explorer
• Detailed info tips (tooltips) for sent/received amount of data.
• New option for disabling Firefox cache.

Recently I get to know firebug come out 1.5 release and I took some time to read about what’s new feature in this release. I found it has been improve the accurate timing using Network Activity Observer which is good to trace the performance of ajax communication between client and server. Besides that, there is Xml Response Explorer which allow you to browse through the xml node instead of copy to xml editor to format it into readable xml format.

If you are developer, I am sure you must be enjoy using firebug. If no, start use it today.