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The latest test results on
https://PrivacyTests.org/nightly.html
confirm that Firefox Nightly and Safari Technology Preview have now fixed their longstanding cross-site Blob leaks. That means we're no longer observing any leaks of tracking data between websites in either of those browsers
When these fixes reach Desktop Release, Firefox and Safari will joining Brave, Tor Browser and Mullvad in have a clean bill of health in the State Partitioning category