I put together this ASP include class which works with FirePHP. It allows you to log values (including strings, multi-dimensional arrays and even objects created with json.asp) to the firebug console and view ASP's built in collection objects which can help (particularly with Ajax where you can't output debug data without breaking the json response.) Ajax script load times and errors are automatically logged for quick viewing.
[
https://github.com/dmeagor/ClassicASP-FirePHP][1]
[1]:
https://github.com/dmeagor/ClassicASP-FirePHPJust include the file and use log(somevalue) to send formatted variables to the firebug console.
Released under MIT open source license