This isn't a bug in Firefox and the site wasn't really scanning for
viruses. It was just a pop up that makes it look like it is scanning.
The website you visited is designed to scam people by making them think
they have a virus on their Windows machine, so they buy some dodgy
spyware/virus
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/16876107/Dependencies.txt
** Attachment added: ExtensionSummary.txt
http://launchpadlibrarian.net/16876108/ExtensionSummary.txt
** Attachment added: pluginreg.dat.txt
