You can do this! Although admittedly the setup is kind of annoying / unintuitive. What you're looking for is the temporary containers extension - https://addons

You can do this! Although admittedly the setup is kind of annoying / unintuitive. What you're looking for is the temporary containers extension - https://addons.mozilla.org/firefox/addon/temporary-containers/ https://addons.mozilla.org/firefox/addon/temporary-container...