Is evercookie really cross-browser?

J

jjsteel

New member
Dec 28, 2008
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Hi,

Before I hire someone to code me a modified version of evercookie, I wanted to confirm something:

If I drop a cookie with evercookie and the user closes his browser (let's say FF) and then opens IE, will the cookie be copied over to IE?


I can see from the FAQ on the site:

Does this work cross-browser?
If a user gets cookied on one browser and switches to another browser,
as long as they still have the Local Shared Object cookie, the cookie
will reproduce in both browsers.


However, he says "switch".
I wasn't sure if both browsers had to be open at the same time for the cookie to transfer over...


Thanks.
 


I'm sure they'd have to import their setting from their 'old' default browser to their new default browser
 
juntao65 said:
Try looking into Flash cookies.
Click to expand...


jjsteel said:
Does this work cross-browser?
If a user gets cookied on one browser and switches to another browser,
as long as they still have the Local Shared Object cookie, the cookie
will reproduce in both browsers.
Click to expand...


A Local shared object is a flash cookie.

I understand that the flash cookie being created by evercookie IS actually cross-browser because all flash cookies are.

However, can a flash cookie automatically create a http cookie on the fly whenever ANY browser is launched?

Has someone ever tried evercookie?
 
evercookie does absolutely work cross-browser. LSO cookies have nothing to do with the actual web browser and will always be readable where Flash is available. evercookie reads them and (re-)stores actual HTTP cookies if not existent already.

So, in other words, there is no HTTP cookie upon a "fresh" browser's launch, but it will be there as soon as the evercookie JS has been run.
 
"As of 2010-10-28, it's only been shown how to clear evercookie on a jailbroken iPhone."

- wikipedia.

That said, it stores cookies in multiple places, and it would be cross browser, with the browser open or not.
 
They're cross-browser if the user has Flash or Silverlight installed in both browsers. However, if the user does not use either of those, then the cookie should be constrained to one browser.
 
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