Cookie black/white list per container

[maxnordlund]

• Is "Firefox will: Never remember history" in the Firefox Preferences/Options under "Privacy & Security > History" selected? Yes/No: No
• Are you using Firefox in a Private Window? Yes/No: No
• Can you see a grayed out but ticked Checkbox with the description "Enable Container Tabs" in the Firefox Preferences/Options under "Tabs"? Yes/No: Yes
• Multi-Account Containers Version: 6.0.0
• Operating System + Version: Mac OS X 10.13.4
• Firefox Version: 59.0.2
• Other installed Add-ons + Version + Enabled/Disabled-Status: Not relevant for this issue

Actual behavior

No way of blocking cookies per container

Expected behavior

Inside the settings for a container have some sort of dialog to black/white list cookies. This is like the global option already in Firefox.

Steps to reproduce

N/A

Notes

Separating sites/origins into different containers is great. It allows the user to avoid being tracked all over the internet, as stated in the description. But in order to truly fulfill that goal, we need a way to selectively block cookies per container. The most basic setting would be to block cookies from the other containers, i.e. if I'm logged in to GitHub in the "work" container, GitHub's cookies should be blocked in all other containers. Also, in "work" cookies from "personal" like Twitter, should be blocked.

Hope this makes sense, and it's related to #303

[iinc]

Cookie AutoDelete supports rules for specific containers. I don't believe it supports blocking but it will delete cookies automatically for you once you close a tab. https://addons.mozilla.org/en-US/firefox/addon/cookie-autodelete/

[jcuenod]

I just want to bump this and #303. It's been quite a while with these open and it seems as though whitelisting/blacklisting of cookies per container is a pretty obvious use case for container tabs.

[andrezero]

Clearly, this use case is very common. Just look at all these extensions that people are creating to isolate sites one by one: