[prplhaz4]

The containerise extension has pulled in most of the features of temporary containers and is still semi actively maintained.

https://addons.mozilla.org/en-US/firefox/addon/containerise/

https://github.com/kintesh/containerise

[discardedrefuse]

Thanks for pointing this out! I was using Containerise + Temp Containers. The "Default Container" section of Containerise has now replaced Temp Containers for me. In case anyone else is interested, here are my settings:

Default Container: On

Container Name: tmp_{domain}

Lifetime: Until last tab is closed

Rule Addition: *.{domain}.{tld}