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

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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)

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