Thank you for you answer.
I tried that but i run into a problem. I set this.RegisterConsoleStyleSheet(''
http://localhost/path/to/RequestProcessor.css"); And set in my php $firephp->setProcessorUrl("
http://localhost/path/to/RequestProcessor.js").
But if i change the line background-image: url(chrome://firephp/skin/tableIcon.png) to background-image: url(chrome://firebug/skin/errorIcon.png) in .logRow-firephp-table > .head > .title in my css there don't happen anything. But if I restart firefox and i load firephp it loads one time correctly. But if i reload the page then, it's wrong again. Is this a bug or am i doing something wrong.
Also in this page
http://www.firephp.org/Wiki/Reference/CustomizeDisplay. The link to the Default Processor is pointing to the trunk version but that version does not display tables correctly.