Problem opening HTTPS sites with self-signed certificates after upgrading to FF31

Yesterday I installed FF31ESR and today I ran into the problem by opening a HTTPS link of a demo server with a self-signed SSL certificate.

Some search on google gave the following help ( which works fine ):

If you are trying to access site with self-signed certificate with Firefox 31 (or later) and get Issuer certificate is invalid error (sec_error_ca_cert_invalid), you have to disable new mozilla::pkix certificate verification.

> Open a new tab and enter about:config
> Then scroll down until “security.use_mozillapkix_verification = true”
> Double click this entry to set this value to false

After this the confirmation is displayed again 🙂

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