New answers tagged firefox
When compromised you should re-install your machine completely. There is no way of knowing for sure that nothing else has been compromised.
Take a look at the key usage extensions on the certificate. They are labelled X509v3 Key Usage by OpenSSL. $ openssl x509 -in mycert.pem -text -noout ... X509v3 Key Usage: critical Digital Signature, Non Repudiation X509v3 Extended Key Usage: TLS Web Client Authentication, E-mail Protection If the certificate can't be used for Digital Signature ...
I think you meant Thunderbird. You can use built-in cryptography features, but first you need your own certificate obtained from CA (to sign emails) or recipient's certificate to encrypt email. Alternatively you can use GnuPG with Enigmail add-on.
I believe you misunderstood the Firefox function. Firefox itself is not a mail client, therefore it doesn' provide you with ability to encrypt and/or sign your emails; use Mozzila Thunderbird with Enigmail and OpenPGP plugins if you're looking for this kind of functionallity. Here's nice how to: https://securityinabox.org/en/thunderbird_main The Security ...
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