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

Wo archive tread sia. Meɖekuku bia biabia yeye ne ehia kpeɖeŋu.

Privacy/Incognito cookies shared with non private window

  • 2 ŋuɖoɖowo
  • 0 masɔmasɔ sia le wosi
  • 1 view
  • Nuɖoɖo mlɔetɔ T.Kallup

T.Kallup
T.Kallup
more options

So I'm running a Firefox Developer Edition (I do this to have my work related stuff separated from my personal stuff).

I was testing A/B testing software on our website, when I noticed that Private window shared some of the non-Private window cookies.

I have made a recording of the issue in action. On the left side is a private mode window (notice the missing extensions), on the right side is a normal window. They are both open on the same page and first thing to notice, is when I refresh the private window, cookies in inspector "flash" in both windows, indicating that there are changes. After that, I'm interested in two cookies: "gbuuid" and "growthBookVariants", it seems like they are shared and when I refresh one windows, it's value is "synced" to the second window.

Now this is annoying, as I have to clear those cookies to test if I get a different variant. When a colleague tested it on Windows, it didn't happen so maybe it's something with my settings/extensions? I attached my privacy settings, but when I fiddled with those, nothing seemed to change.

So I'm running a Firefox Developer Edition (I do this to have my work related stuff separated from my personal stuff). I was testing A/B testing software on our website, when I noticed that Private window shared some of the non-Private window cookies. I have made a [https://drive.google.com/file/d/1TmwXjrIWwG90dh61UG_SOLKa8LFrtm3j/view recording of the issue] in action. On the left side is a private mode window (notice the missing extensions), on the right side is a normal window. They are both open on the same page and first thing to notice, is when I refresh the private window, cookies in inspector "flash" in both windows, indicating that there are changes. After that, I'm interested in two cookies: "gbuuid" and "growthBookVariants", it seems like they are shared and when I refresh one windows, it's value is "synced" to the second window. Now this is annoying, as I have to clear those cookies to test if I get a different variant. When a colleague tested it on Windows, it didn't happen so maybe it's something with my settings/extensions? I attached my privacy settings, but when I fiddled with those, nothing seemed to change.
Screen ƒe photowo kpe ɖe eŋu

T.Kallup trɔe

All Replies (2)

zeroknight
zeroknight
more options

Does it still happen in a new profile? An easy way to test a new profile is to install Nightly and see if it happens there or refresh your existing profile.

T.Kallup
T.Kallup Biabia la
more options

zeroknight napsal(a)
Does it still happen in a new profile? An easy way to test a new profile is to install Nightly and see if it happens there or refresh your existing profile.

Yes it does. I went to about:profiles, created new profiles and clicked the `Launch profile in new browser` button. Confirmed that I was not logged in and no addons were installed and the cookies issue still happens. Visiting the site sets cookies, opening private window with the same site updates the cookies in both windows and removing it in one window removes it from both.