Some users (including myself) disable favicons, since I don't use favicons. (I disabled it when I set up the computer, far before I heard anything about favicon supercookies.)
In this case, it may be able to figure out that favicons are disabled (if the implementation is written to support that), but not more than that.
In this case, it may be able to figure out that favicons are disabled (if the implementation is written to support that), but not more than that.