There's a setting in about:config that can help with this: privacy.firstparty.isolate set to true. It's also available as an add-on to make switching it on an

There's a setting in about:config that can help with this: privacy.firstparty.isolate set to true. It's also available as an add-on to make switching it on and off easier, if you prefer: https://addons.mozilla.org/en-US/firefox/addon/first-party-isolation/ https://addons.mozilla.org/en-US/firefox/addon/first-party-i...