ISSUE: Firefox and Microsoft Subdomains

UPDATE: According to Bleeping Computer, this should be fixed in Firefox 95.0.1, which should be available now.

So… I’m one of the last 25 people still using Firefox. And over the past couple of days, I haven’t been able to access my Microsoft Rewards dashboard. Any attempt to access rewards.microsoft.com gets me this error:

MS Rewards Error Page

For the search engines and people on mobiles:

Secure Connection Failed

An error occurred during a connection to account.microsoft.com. The OCSP response does not include a status for the certificate being verified.

Error code: MOZILLA_PKIX_ERROR_OCSP_RESPONSE_FOR_CERT_MISSING

  • The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
  • Please contact the website owners to inform them of this problem.

Learn more…

I did some googling of “OCSP Firefox” and found some bug reports from 2015. They didn’t seem to help much. I tried all the usual stuff, but that didn’t help. On a hunch, I opened Firefox’s hidden settings, changed a setting and.. HOORAH! It worked again!

I normally would have left it at that, except I was reading Google News on my phone a few minutes ago and saw this post by Vishal Gupta at AskVG. He was having the exact same issue with docs.microsoft.com and other Microsoft subdomains. Like me, Vishal tried all the usual fixes: dumping the cache, loading the page in “Troubleshoot Mode”, etc. It worked fine in Chromium Edge, just not Firefox.

Vishal and I had the same idea. He also went to Firefox’s deep settings and  turned off two options. I’m sure he knows far more than I do about it, so I’d hope you’d trust his work over mine. But I only set this setting to false:

security.ssl.enable_ocsp_stapling

And that fixed the issue for me. At least until Microsoft fixes the issue with their cert, or Firefox fixes the bug that’s triggering the warning.

If you’re having this issue, please go to Vishal’s page and read his thorough instructions (if you know what “about:config” does in Firefox, you’re halfway there already).

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