Total Cookie Protection is enabled by default in Firefox, and Privacy Guides recommend using Sanitize on Close with per-site exceptions that disable Total Cookie Protection. If you want to stay logged in to particular sites, you can allow exceptions in Cookies and Site Data → Manage Exceptions… T…

approved - I think we should add this warning to the sanitize on close section and additionally note that if you are looking for this behavior, while it’s an option, we would recommend using Mullvad Browser if you want to delete all data when closing the browser. This would be better in line with ou…

[image] anon59300808: Total Cookie Protection is enabled by default in Firefox, and Privacy Guides recommend using Sanitize on Close with per-site exceptions that disable Total Cookie Protection. Just to clarify your point: it does not globally disable Total Cookie Protection. It only affects…

[image] any1: Just to clarify your point: it does not globally disable Total Cookie Protection. It only affects the sites you add as exceptions. This doesn’t change much, since the most important sites for me are in exceptions and they’re not protected. If sites like YouTube are exceptions, …

I believe Firefox Multi-Account Containers should still protect sites you have set exceptions for. That is what I’m doing and what Arkenfox also seems to recommend .

One option you could try is blocking YouTube/Google as a third party and only allowing them as first party in uBlock Origin.

The developer of Arkenfox suggested several solutions , if adding any extra extensions isn’t outside your threat model I myself use and recommend Multi-Account Containers . The extension is not required to use containers (if you use Arkenfox, they’re turned on by default) but gives them added function…

Not using exceptions at all seems to be the only solution. Using “Block All cross-site cookies” mode with exceptions It doesn’t work because exceptions also apply to blocking third-party cookies. If YouTube is in exceptions, YouTube cookies are automatically allowed on other sites as third-party…

What is a temporary solution until the bug is fixed? Using containers? I’d say using containers with the sites you make exceptions for is a full (and stronger) solution than Total Cookie Protection is on its own. If sites like YouTube are exceptions In my mind, the exceptions list is for webs…

What about using PWA for the sites in the exception list? Could that be a workaround?

[image] xe3: I’d say using containers with the sites you make exceptions for is a full (and stronger) solution than Total Cookie Protection is on its own. I don’t think so. When using exceptions for YouTube, if Site 1 has an embedded YouTube video and you then go to Site 2 with an embedded vi…

[image] user1: What about using PWA for the sites in the exception list? Could that be a workaround? Isn’t a PWA just a simple shortcut? Or are you talking about the PWAsForFirefox addon? It requires many things to install, I don’t think it’s a good workaround.

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Mention how per-site exceptions affect Firefox's Total Cookie Protection

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anon59300808 December 1, 2025, 8:45am 13

It’s still just a shortcut and uses browser data.
PWAsForFirefox addon seems to work differently. It uses a new profile for each PWA. But it requires installing a program outside the browser.

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