I am using Firebug 1.10.2 with Firefox 14.0.1. When showing a web page, the Firebug add-on has this \"behavior\": Firebug’s “Aborted” message upon Ajax request.
I saw this problem when trying to load a JavaScript file using HTTPS, but was serving the site on my local development environment using HTTP. The request to fetch the JavaScript file would fail with the Aborted message in FireBug. Making the requests use the same protocol worked for me.