"Self-destruction of third-party cookies" prevents login on some websites on Firefox

[cwchristerw]

AdGuard Extension version

4.2.241

Browser version

Firefox 121.0

OS version

Linux Mint 21.2

What filters do you have enabled?

No filters

What Stealth Mode options do you have enabled?

Self-destruction of third-party cookies

Issue Details

I strongly believe that setting self-destruction time shoudn't prevent creating third-party cookies.

I have created new blank profile and installed Adguard AdBlocker extension, then proceed to settings. In the settings I'll disable every filter. I will enable Stealth mode with only "Self-destruction of third-party cookies" enabled.

It has broken Microsoft Office365 login and Github login. In Office365 login flow it will loop forever in "https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize" due to missing third-party cookie. Usually resetting cookies will solve issue with Github login, it might be unrelated. Also I have issues with login using Suomi.fi-tunnistus due to this issue.

I have disabled "Self-destruction of third-party cookies" setting to remediate this issue temporarily. Technically I'll reset all cookies when closing Firefox and this feature isn't that necessary for me.

I have tested this also with Chromium (120.0.6099.129) with AdGuard AdBlocker (4.2.241) and these websites worked properly without any issue.

Expected Behavior

I should be able to login to these services with self-destruction enabled. It should only force cookies to expire at specified time.

Screenshots

Screenshot 1:

Additional Information

No response

[alexx7311]

@cwchristerw Hello! Thanks, we'll look into it! For now, you can use these rules disabling Stealth mode on this website, e.g.:

@@||login.live.com^$stealth
@@||login.microsoftonline.com^$stealth
@@||live.com^$stealth

[enakr]

CRM 880073 - same issue. When the interval is set to 180, websites can be logged in.