Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Firefox keeps storing a supercookie called "86868755-6b82-4842-b301-72671a0db32e.mozilla" on my computer. Is this normal and can it be prevented?

  • 1 reply
  • 1 has this problem
  • 7 views
  • Last reply by cor-el

Kf5qP0
Kf5qP0
more options

I use a program called Security Task Manager to detect and remove whatever super cookies Firefox may store on my computer. Recently in 2017, Firefox started storing a super cookie named "86868755-6b82-4842-b301-72671a0db32e.mozilla" on my computer. I need to know if it is common for Firefox browsers to store this particular cookie on users' computers. Also, I would like to know if there any methods available to prevent Firefox from storing this cookie on my computer.

I use a program called Security Task Manager to detect and remove whatever super cookies Firefox may store on my computer. Recently in 2017, Firefox started storing a super cookie named "86868755-6b82-4842-b301-72671a0db32e.mozilla" on my computer. I need to know if it is common for Firefox browsers to store this particular cookie on users' computers. Also, I would like to know if there any methods available to prevent Firefox from storing this cookie on my computer.
Attached screenshots

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

That is a special safe browsing cookie used by the fishing protection feature. Best is to leave such cookies alone and do not use external to remove such data because such software isn't aware of the Firefox internals and can easily corrupt your profile folder with the risk of losing your data. 

// Unique first-party domain for separating the safebrowsing cookie.
// Note if this value is changed, code in test_cookiejars_safebrowsing.js
// should also be changed.
#define NECKO_SAFEBROWSING_FIRST_PARTY_DOMAIN \
  "safebrowsing.86868755-6b82-4842-b301-72671a0db32e.mozilla"

Modified by cor-el