When I try to reproduce this, it does slow the browser for a little, but
then firefox prompts that the script is slow or unresponsive and then
lets me terminate it. I haven't looked at the javascript too closely,
but it's probably just has an infinite loop or is doing something really
inefficiently
** Attachment added: "html, css, and js files that show the behaviour"
http://launchpadlibrarian.net/35724983/FF-js-Bug.zip
** Attachment added: "Dependencies.txt"
http://launchpadlibrarian.net/35724984/Dependencies.txt
** Attachment added: "ExtensionSummary.txt"
http://launchpadlibrari
