There's no need for this anymore security-wise thanks to First-Party Isolation AKA Total Cookie Protection. Every domain is totally separated.

I couldn't enumerate for you all the things isolated to a container; I am no expert. However, I believe first-party isolation only concerns itself with cookies.

IIRC cache is also isolated, I can't seem to find the blog post now, but as I remember mozilla essentially said that temporary containers are replaced by their site isolation.

So FPI would cover the common need, to completely isolate 1 site from another. Containers would still be applicable if you wanted to maintain separate sessions to the same site. Like viewing a site without logging in, and in another tab doing so.

I've found this good for webdev of course ~

Yep! I use containers for that, quite handy.

> assign separate containers to a different proxy

what VPN provider can you use with this extension?

mozilla vpn

https://blog.mozilla.org/en/products/mozilla-vpn/multi-accou...

which is a rebranded mullvad. mullvad is pretty cool (doesn't require any private info for creating an account or paying, and they recently disabled recurring payments so they don't need to store credit card info, even though this has a financial hit to the company https://mullvad.net/en/blog/2022/6/20/were-removing-the-opti...)

I am using it with my own wireguard instance.

how are you binding only specific containers to wireguard?

I think I should have said "my own proxy" rather than wireguard. I just happen to access it via wireguard. Though I did want to point out that any vpn proxy would work.

The Multi Account Containers extension has an Advanced proxy settings at the bottom when you go in to Manager Containers. I have a go based socks proxy running on docker somewhere. I enter the details for that there. Syntax is socks://ip:port .

I have two socks implementations installed. I A/B test them sometimes but they seem to be basically equivalent in terms of performance.

https://github.com/net-byte/socks5-server

https://github.com/ocassio/go-socks5-proxy (old but works fine)

Note: If you're using a chromium based browser you can use the excellent SwitchyOmega plugin to do this much easier and with more functionality. No containers of course.

If you want to assign proxy rules without using containers, the Proxy SwitchyOmega add-on is also available for Firefox:

- Proxy SwitchyOmega: https://addons.mozilla.org/en-US/firefox/addon/switchyomega/

- Source: https://github.com/FelisCatus/SwitchyOmega

Another option is the FoxyProxy add-on:

- FoxyProxy Standard: https://addons.mozilla.org/en-US/firefox/addon/foxyproxy-sta...

- Source: https://github.com/foxyproxy/firefox-extension

Thanks. I didn't know switchy was available for Firefox too. That's great. It must not have come up in my searches. Probably because of its date.

I am aware of foxyproxy. It works OK. I was using it until the containers gained proxy support.