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I've been using the Private Tab addon to open separate logins in the same window for years: https://addons.mozilla.org/firefox/addon/private-tab/ https://addons

by mozillauser2017 10y ago

I've been using the Private Tab addon to open separate logins in the same window for years: https://addons.mozilla.org/firefox/addon/private-tab/ https://addons.mozilla.org/firefox/addon/private-tab/