The cunning Key nude filter relying on Internet Explorer’s superior im age handling has inspired the creation of additional nude filters, centring on the prospect of nude tsundere Shana and her companions.
Enlarge the images and then select them with Ctrl + A to view the unclothed cast of Shakugan no Shana. If you need help, there are many tips in the comments of the previous article.
It may also be possible to obtain the same effect in other applications, though currently Firefox is lacking in this area. Mozilla are expected to be looking at the problem.