This might be a duplicate question but as you can see they didn’t get the correct answer.
How to uniquely identify a computer?
Uniquely identify one computer
how would you remembers a computers regardless of ip, “browser” cookies, and browser itself. So It will recognize it once you use it from another browser, or ip address. Any ideas?
UPDATE
I found out that there is a possibility using flash cookies:
it seems that it’s shared across browsers and clearing the browser cookies does not remove it.
my question now is how can I see my flash cookies and know if that is what facebook is doing?
- Ubiquitous availability (95 percent of visitors will probably have flash)
- You can store more data per cookie (up to 100 KB)
- Shared across browsers, so more likely to uniquely identify a machine
- Clearing the browser cookies does not remove the flash cookies. –Joeri Sebrechts
Facebook only remembers based on the cookie in your browser.
The proof to the pudding is if you login and then switch to a different browser, you are not logged in there.