Firefox Error code: NS_ERROR_NET_INADEQUATE_SECURITY

Computers and Internet 1 Minute

If you get this error (NS_ERROR_NET_INADEQUATE_SECURITY) when visting HTTPS site on Firefox, that means the web server has something wrong with SSL certificate (old ciphers, lower TLS version).

Here is how to fix your Firefox to access that page:

  1. Open Firefox and type about:config in the address bar
  2. Click on I accept the risk button
  3. Type http2 in search box
  4. Find network.http.spdy.enabled.http2 and double click to make it false (to disable http2).

Screen Shot 2018-10-21 at 10.08.40 PM

That’s all. You may need to close Firefox and reopen it.

Hope it helped you. 🙂

 

Published by --Anand--

Being in Silicon Valley for years, I became a IT Infrastructure Geek by experience and surrounded by other Geeks everywhere. I try to help others by the solutions I found on odd occasions.

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3 thoughts on “Firefox Error code: NS_ERROR_NET_INADEQUATE_SECURITY”

  3. Dear ‘Anand the Architect’, —after hours of pondering the problematical SecurityError- message, (-the supposed solutions on Utube were impossible to follow) –alas we found your wonderfully easy to follow 3-Step solution which works amazingly well… Million Thanks my brilliant friend…. Bob Vonheck in sanDiego

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