Regarding that add-on, I've become a huge fan of this: https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ https://addons.mozilla.org/en-U

Regarding that add-on, I've become a huge fan of this: https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ https://addons.mozilla.org/en-US/firefox/addon/multi-account... The concept is: create additional Named containers, and assign domains to always load in X named container