Multi-account-containers: Google recognizes me across container tabs

[Integralist]

• Multi-Account Containers Version: 7.1.0
• Operating System + Version: macOS Catalina 10.15.7
• Firefox Version: 81.0.1
• Other installed Add-ons + Version + Enabled/Disabled-Status:

Name	Type	Version	Enabled	ID
Amazon.co.uk	extension	1.3	true	[email protected]
Bing	extension	1.2	true	[email protected]
Chambers (UK)	extension	1.0	true	[email protected]
Dark Reader	extension	4.9.21	true	[email protected]
DuckDuckGo	extension	1.1	true	[email protected]
DuckDuckGo Privacy Essentials	extension	2020.10.2	true	jid1-ZAdIEUB7XOzOJw@jetpack
eBay	extension	1.2	true	[email protected]
ExpressVPN: VPN proxy to unblock everything	extension	4.9.4.3713	true	[email protected]
Firefox Multi-Account Containers	extension	7.1.0	true	@testpilot-containers
Google	extension	1.1	true	[email protected]
Privacy Badger	extension	2020.10.7	true	jid1-MnnxcxisBPnSXQ@jetpack
uBlock Origin	extension	1.30.2	true	[email protected]
Wikipedia (en)	extension	1.1	true	[email protected]

Actual behavior

I open a 'Personal' container and log into gmail.com. I open another 'Personal' container and visit youtube.com and discover that I'm now logged into my Google account there.

Expected behavior

To visit youtube.com in another 'Personal' container should not result in me being logged into a Google account within that container. i.e. I should be a non-logged in/anonymous user as far as YouTube is concerned.

[NiklasBr]

I might be misunderstanding you, but it reads to me like things works as advertised:

The "Personal" and "Personal" windows/tabs are one container, not two, they can share cookies and such data. Therefore if you want two sites to not be able to do this you need two different containers, such as Mail and Media. Log in to Gmail in Mail and the open YouTube in Media and now Google should not be able to follow you into the second container.

[Integralist]

Ahhh. OK I definitely misunderstood what a 'container' represented then in the context of this Firefox plugin.

I presumed that each 'personal' tab opened was a _new_/_unique_ container instance (so although they both would be grouped by the category of 'personal' they would be isolated -- which I now understand is incorrect 🤦‍♂️)

[FlorianWendelborn]

@Integralist I think this issue can be closed. Can you do that?

[maxxcrawford]

@Integralist You may want to checkout Temporary Containers. It's by one of this extensions' maintainers, @stoically!

[Integralist]

Thanks all!