Hi Jan, if I click on this link I get this Firefox page:

*This Connection is Untrusted*

          You have asked Firefox to connect
securely to blog.getfirebug.com, but we can't confirm that your connection
is secure.
          Normally, when you try to connect securely,
sites will present trusted identification to prove that you are
going to the right place. However, this site's identity can't be verified.

*          What Should I Do?*

            If you usually connect to
this site without problems, this error could mean that someone is
trying to impersonate the site, and you shouldn't continue.

        blog.getfirebug.com uses an invalid security certificate.

The certificate is only valid for the following names:
  www.getfirebug.com , getfirebug.com  

(Error code: ssl_error_bad_cert_domain)

--------------------------------------

I do not even get the option to bypass with the warning with 'I understand
the risks'.  That option has disappeared.  I have just upgraded to Firefox
15.0.  Thought you should know so you can get another SSL certificate, or
stop forcing https redirection...  (I tried changing https to http and your
server changes it back.)

Regards,

Sebastian