On a Samsung S6 Plus Edge running on Android 7, certain security certificates will break since September 2021: the workaround which Let's Encrypt implemented doesn't seem to work in Samsung Internet. I get the standard "Back to safety" screen.

For browsing this is not an issue, I can use firefox. But I have an issue with WhatsApp: it will not load preview images from such websites, as probably it routes such requests through Samsung Internet or some samsung API. Changing the default browser doesn't help.

Is there a workaround for this which doesn't involve rooting the device ? I've seen this answer, but it looks like I can't install certificates manually if the device isn't rooted.

  • doesn't seem to work in Samsung Internet - it is more "does not work in any app except Firefox as Firefox has it's own certificate trust store". As your device does not receives updates the only alternatives are rooting + installing the Let's Encrypt certificate or install a custom ROM with a newer Android version.
    – Robert
    Dec 8, 2021 at 17:26
  • @Robert "Both owners of older Android devices and Let's Encrypt subscribers shouldn't need to do anything for this workaround to function" according to the article on androidpolice I've linked ... And according to Let's Encrypt "Android devices as far back as 2.3.6 will continue to work" until 2024. That's why I imagine Samsung as the culprit ...
    – 1NN
    Dec 8, 2021 at 17:41
  • 1
    Samsung as the culprit I agree with you, that is the most likely reason, too many modifications by Samsung but the relevant they missed or did something wrong.
    – Robert
    Dec 8, 2021 at 18:20


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