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(site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

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New User

(site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

Firefox uses an invalid security certificate. The certificate is only valid for Firefox.blog. I get this message when I click on Firefox News.

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Support Forum Moderator

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

URL of the (site name) website is?

http://firefox.org/news/ - ??

9 REPLIES
Support Forum Moderator

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

URL of the (site name) website is?

http://firefox.org/news/ - ??

New User

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

I guess this solved it; I got to the Firefox news.

Site Moderator

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

Where did you click "Firefox News" ?

Does it help if you change the protocol from https to http ?

See also:

New User

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

https://blog.mozilla.org/blog/2012/08/28/firefox-for-android-gets-speedy-and-powerful-upgrade-for-ta... This is the site I was trying to get to when I got the error message. Both of the links above gave me the same error message. It is not a big deal just wondering why I get an unsafe message here.

New User

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

I made a mistake on my earlier question. I meant Mozilla News.

Site Moderator

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

You may have a problem with an intermediate certificate that Firefox has stored.

Try to rename the cert8.db file in the Firefox profile folder to cert8.db.old or delete the cert8.db file to remove intermediate certificates that Firefox has stored.

If that helped to solve the problem then you can remove the renamed cert8.db.old file.
Otherwise you can rename (or copy) the cert8.db.old file to cert8.db to restore the previous intermediate certificates.
Firefox will automatically store intermediate certificates when you visit websites that send such a certificate.

If that didn't help then remove or rename secmod.db (secmod.db.old) as well.

New User

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

No this did not solve it.

"blog.mozilla.org uses an invalid security certificate.

The certificate is only valid for blog.mozilla.com"

This is the technical info I get on the page.

Site Moderator

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.

  • Click the link at the bottom of the error page: "I Understand the Risks"

Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".

  • Click the "View..." button and inspect the certificate and check who is the issuer.

You can see more Details like intermediate certificates that are used in the Details pane.

New User

Re: (site name) uses an invalid security certificate. The certificate is only valid for firefox.blog

Thanks