Implement 1st party storage isolation

[bsclifton]

Carried over from brave/browser-laptop#3826

https://twitter.com/rlbarnes/status/773895944031076352, AKA > https://www.torproject.org/projects/torbrowser/design/#identifier-linkability

[da2x]

FPI in Firefox also isolates the DNS cache and connections (which became even more relevant recently).

[siric]

First Party Isolation and Containers would be great additions to the browser.

[loyl1]

I'm not sure what this means. Was FPI dropped?

[ahake]

any progress on this?

[diracdeltas]

@riastradh-brave could you post an update here and answer the q's above? thanks

[MagsMagnoli]

• Multi-Account Containers
• Temporary Containers

These two extensions for Firefox are preventing me from using Brave as my primary browser. Would love to see something like this implemented!

[ParaplegicRacehorse]

Bump. Without some sort of isolation mechanism, especially for cookies and js, Brave will never become my primary browser even though I very like [almost] everything else about it. Private window, blah blah, I want the containerization linked to by @MagsMagnoli, above, or something substantially similar.

[x7a]

any progress? it's the only feature that i really miss in brave

[12people]

Firefox now has first-party cookie isolation built in as well, as detailed in Mozilla's recent blogpost on the feature.

Would love to see something like this in Brave.

[techsk8]

Any update on this?

[iefremov]

@robinhood018 The work happens around #15906 and #19099

@pes10k should we close this issue in favor of 1PES-related ones?

[pes10k]

@iefremov i think that sounds great, though can we link to the issue for "expose 1PES as a cookie option in shields" too?

[iefremov]

@pes10k I can't find that one, can you please post the link?

Closing for now

[pes10k]

This is the one i was thinking of: #15018

[techsk8]

Will this feature be also added to the official release?

[pes10k]

@robinhood018 It depends on what you're looking for. Folks in the issue seem to be discussing different things.

If you're looking for something similar to Firefox's first-party cookie isolation / Total Cookie Protection, Brave has already shipped something like this (but more protective, because Brave lifetimes 3p storage much much shorter than Firefox) since 2021 [1].

If you're looking for something like a "automatically generated, automatically forgetting, automatically stretching temporary storage area", no browser has something like that (though some browsers have a subset of it). Brave is working on it, and has shipped several incremental steps (see [2] and [3] for some intermediate steps) and hopes to have the final, total solution shipped soon

1: https://brave.com/privacy-updates/14-partitioning-network-state/
2: https://brave.com/privacy-updates/7-ephemeral-storage/
3: https://brave.com/privacy-updates/16-unlinkable-bouncing/

[techsk8]

The only thing I'm looking for is Compartmentalization, just like Firefox has those specific containers for specific links.