Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

[Solved] certificate contains unknown critical extension error firefox 5

  • 1 freagra
  • 28 leis an bhfadhb seo
  • 1 view
  • Freagra is déanaí ó mtimmjcp

more options

Secure connection failed An error occurred during a connection to an internal website Certificate contains unknown critical extension (Error code: sec_error_unknown_critical_extension)

Secure connection failed An error occurred during a connection to an internal website Certificate contains unknown critical extension (Error code: sec_error_unknown_critical_extension)

Athraithe ag the-edmeister ar

All Replies (1)

more options

I imported the root chain for my internal CAs into FireFox and this fixed the problem. Tools->Options->Advanced->View Certificates->Import