Is there a way to determine a line from which XHR was issued in firebug or web inspector?

Question

Is there a way to determine a line and filename from which XHR was issued in Firebug or Web Inspector (maybe Opera Dragonfly/IE Developers Toolbar)? If there isn't, what is the best way to find that out? Just searching the codebase for the URI called? (often it will be constructed, though)

Answer 1

In Developer Tools(chrome) you can set breakpoints for any XHR from the Script tab.

• Script Tab
• XHR Breakpoints(on right hand side)
• Click the + and press return
• A new item will be added saying "Any XHR"
• Run the script and it will break on any XHR :-)

Answer 2

For Firebug you can start with http://getfirebug.com/doc/breakpoints/demo.html