1417744 - Mysterious cookie constantly re-appears without visiting any sites

Status: RESOLVED INVALID

(Firefox :: Untriaged, defect)

Description

[drcheap]

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20171112125346

Steps to reproduce:

Options->Privacy & Security->Show Cookies
There is a cookie from javarevisited.blogspot.com, it contains some UID value
If I remove this cookie using "Remove Selected" it goes away
If I close the dialog and choose Show Cookies again, it is back!

Accept cookies from websites is NOT checked

There is no exception made for this site (or anything with the same domain)

I verified with Wireshark that there is no traffic to this site.

This happens even with all add-ons disabled, in safe mode, and even with my network cable unplugged!


Actual results:

The cookie is either not actually being deleted, or it is being re-added by something internal to the browser.


Expected results:

The cookie should be removed, and not return.

Comment 1

[Kohei Yoshino [:kohei]]

Could be a malware or something? Please visit https://support.mozilla.org/questions/firefox to get help. Thank you!