[mdaniel]

If you haven't seen it, there's also https://addons.mozilla.org/en-US/firefox/addon/temporary-con... (https://github.com/stoically/temporary-containers MIT) when you don't care about the containers but do care that their browsing context is isolated. The screenshot even shows the handy "delete temporary container 15 minutes after the last tab closes")

Actually, sorry, it seems to be https://addons.mozilla.org/en-US/firefox/addon/temporary-con... and https://github.com/GodKratos/temporary-containers) based solely on the language present in the add-on and commit history

[TheNewsIsHere]

That’s fantastic, thank you.

I have a very useful plugin that automatically deletes website data (other than history and downloads) after a configured interval once you’ve closed the tab or window. You can define an exception list. I cannot recall its name, I’ll post back when I’m back at my computer.

[mantra2]

Last time I looked into it — last year - the only one I found was Temporary Containers and from what I read the developer unfortunately passed away.

Glad to see someone forked it though, I might give that a try again.