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Why does Strict-Transport-Security not work on Firefox for Android?

  • 1 reply
  • 1 has this problem
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  • Last reply by wiwouchu

wiwouchu
wiwouchu
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Our internal server sends the Strict-Transport-Security header but it does not work on Firefox for Android. It works on the PC but not on the mobile phone. Max-Age is set to 31536000 seconds (1 year). Now when I access our servers via https, the browser saves the HSTS policy. Now I close Firefox on the PC and then I open Firefox and press F12 to see the connections. If I now access http://example-internal-server.local the browser overwrites the request with HTTPS as expected.

But on Firefox for Android it doesn't work as expected. On my mobile I open https://example-internal-server.local again so that the browser can save the HSTS policy. Now I close Firefox and reopen Firefox. Now I visit http://example-internal-server.local and expect Firefox to automatically convert the unsafe request to HTTPS because of HSTS. Which he's not. What's going on here?

Our internal server sends the Strict-Transport-Security header but it does not work on Firefox for Android. It works on the PC but not on the mobile phone. Max-Age is set to 31536000 seconds (1 year). Now when I access our servers via https, the browser saves the HSTS policy. Now I close Firefox on the PC and then I open Firefox and press F12 to see the connections. If I now access http://example-internal-server.local the browser overwrites the request with HTTPS as expected. But on Firefox for Android it doesn't work as expected. On my mobile I open https://example-internal-server.local again so that the browser can save the HSTS policy. Now I close Firefox and reopen Firefox. Now I visit http://example-internal-server.local and expect Firefox to automatically convert the unsafe request to HTTPS because of HSTS. Which he's not. What's going on here?

Modified by wiwouchu

All Replies (1)

wiwouchu
wiwouchu Question owner
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Okay, the problem is now half solved but only half solved. I had to create a PTR record for the domain. Now it works on the stable (default) Version of Firefox 60.0 on my mobile.

The new problem is now: How can I make it work in Firefox Nightly on my mobile phone? It does work on Nightly on the PC but not on my mobile. Or does Strict Transport Security (HSTS) generally not work on Nightly?

Modified by wiwouchu