Have you tried Firefox containers[1]? Or another alternative could be two Firefox versions installed, regular and the developer edition. [1] https://addons.moz

Have you tried Firefox containers[1]? Or another alternative could be two Firefox versions installed, regular and the developer edition. [1] https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ https://addons.mozilla.org/en-US/firefox/addon/multi-account...