I can get some future Web sites and others do not. When I try to connect to any site, I get this message and cannot connect

The secure connection failed

An error occurred during a connection to mail.yahoo.com. The peer certificate has an invalid signature. (Error code: sec_error_bad_signature)

   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.

The most common reason for the 'sec_error_bad_signature' many sites seems to be the shield of Web of Avast. Web Shield intercepts your navigation and filter, but to filter sites secure, it has "fake" certificates for Firefox. Avast have set Firefox to rely on its false certificates, but which seems to fail on a regular basis.

To test this theory, try disabling scanning of encrypted sites. I saw these steps in another post:

  1. Open the Avast dashboard on an affected system.
  2. Select settings in the left side menu.
  3. Adopt a Protection Active.
  4. Click on customize next to the Web Shield.
  5. Uncheck the option "Enable HTTPS analysis", and then click ok

If that solves the problem, but you want to filter encrypted communication, you need to import the Avast! signature in Firefox Certificate Manager of certificates, References tab.

Tags: Firefox

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