I had not realized how many fixes were in there…but thanks to Tom’s Hardware that is clear:
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Six digit PIN. You should move to that or use Touch ID
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Two factor authentication. You need to have another device to login to El Capitan or iOS 9. Although a pain, it is very secure.
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LibreSSL vs the buggy OpenSSL variety.
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App Transport Security. Although google dislikes it because it disables ad networks (draw your own conclusions on that).
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Mac address randominization for more privacy
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Signed Safari extensions (finally!)
