I think Firefox multi-account containers were at some point slated to have per-container proxy settings. This should allow each container to use its own IP address, with the help of either a proxy provider or a set VPN connections with local proxy servers.
I wonder if said functionality has been implemented, and if so, whether anyone has taken advantage of it to make per-container addresses easy for casual users.
Per-container proxy settings are already supported.
I use them for a "home" container that gets routed via my home router's Wireguard VPN independently from all other traffic on my computer (as I don't want to take the performance hit of tunneling everything) using the excellent wireproxy [1].
I wonder if said functionality has been implemented, and if so, whether anyone has taken advantage of it to make per-container addresses easy for casual users.