On this particular issue Firefox-on-windows is unlikely to be a solution. If they can and are doing it to Chrome on Windows they can to Firefox too. It might be more work as Edge doesn't share a codebase with Firefox like it does with Chrome, but unless FF is somehow encrypting everything in a way that blocks MS⁰ it won't be particularly difficult.

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[0] Likely impossible. Even making it difficult enough to slow MS if they had the intention is likely completely impractical.