Congress asked to investigate Internet “supercookies”
oregonbusinessreport.com
oregonbusinessreport.com
Yes, they work on most modern browsers, and are very difficult to remove entirely.
No, they do not store anything on any modern browser surfing in "privacy" mode.
I was pretty disappointed to be honest. I was hoping to use them to track fraudulent free trial abusers.
This might work in "privacy" mode as far as I understand, unless you disabled the local cache? I have not tested this.
I completely disabled the cache in Firefox two months ago for this very reason. I haven't noticed any performance problems with this in my general day to day browsing, but I have a decent broadband connection, and good connectivity at work so YMMV. Here's how I did it: https://grepular.com/Preventing_Web_Tracking_via_the_Browser...
If you disable your browsers cache and/or JavaScript, I guess that would fix this particular issue.
If you want to keep both the cache, and JavaScript, then you need to stop people from doing this sort of thing, with legislation.
If we don't have a technical solution for a problem (which we don't in this case), then regulation is appropriate. If and when we find a technical solution for this problem, then the legislation will be deprecated. Until that point, it is useful.
What is "ridiculous", is assuming that all problems have technical solutions.
Flash just needs to die. It adds nothing to my "user experience". Except stealth tracking of course.