This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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.

Some sites keep cookies even when private windows close.

  • 4 replies
  • 1 has this problem
  • 13 views
  • Last reply by cor-el

jpezz
jpezz
more options

Open Firefox. Verify no cookies. Clear any cookies if they exist.

Then open a single private window.

Go to tripadvisor.com (happens with some other sites but only a few).

Browse a few pages.

Close the private Window. No private windows/Container tabs are open.

All tripadvisor cookies should be cleared but they are not.

Verified by Cookie Quick Manager.

Why and how does tripadvisor manage to keep cookies on my system.

Open Firefox. Verify no cookies. Clear any cookies if they exist. Then open a single private window. Go to tripadvisor.com (happens with some other sites but only a few). Browse a few pages. Close the private Window. No private windows/Container tabs are open. All tripadvisor cookies should be cleared but they are not. Verified by Cookie Quick Manager. Why and how does tripadvisor manage to keep cookies on my system.

All Replies (4)

FredMcD
FredMcD
more options

In Private Mode, all data is stored in a temporary file. This file is removed when the browser is closed.

jpezz
jpezz Question owner
more options

Cookie Quick Manager (firefox addon) show that under normal circumstances, when I open a private (or multiple private) window(s) and then visit sites, the cookies are created. When the last private window (or the only private window) is closed, all cookies associated with the private window(s) is/are removed - except from a few sites. While it may be true that they are all removed when I exit the browser, it appears they should be cleared when I exit private browsing.

Roland Tanglao
Roland Tanglao
  • Moderator
more options

Hi jpezz

My guess is that an add-on is causing this issue.

If you start in Firefox Safe Mode do you see this issue? If you don't see it in Firefox Safe Mode then it's probably an add-on or 3rd party software.

Cheers!

...Roland

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

Is this about cookies or also possibly about storage ?

Is this also reported in the Firefox Cookie Manager ?

  • Options/Preferences -> Privacy & Security
    Cookies and Site Data: "Manage Data"