According to the test of the privacytest.org website, I found that the Firefox browser can fully pass the Cross-session first-party tracking tests and Cross-session third-party tracking tests after turning on the privacy mode, but it cannot pass these two tests if the privacy mode is not enabled, which means that if the privacy mode is not enabled, The Firefox browser doesn't block Cross-session first-party tracking and Cross-session third-party tracking. My suggestion is that Firefox should be able to pass Cross-session first-party tracking tests and Cross-session third-party tracking tests even when you don't have privacy mode enabled