Firefox Community Forum

ATT is my internet service provider. I use their website as my home screen. Yesterday, I started getting an error message when I tried to go on-line. I have contacted ATT, and they have determined that the problem is with Firefox, and not their website. I can go from the ATT screen to any other website, and it works fine. This is the message that I get:

Secure Connection Failed

An error occurred during a connection to www.att.com. You are attempting to import a cert with the same issuer/serial as an existing cert, but that is not the same cert.

Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL

   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.

Up until today I have never had trouble accessing My [edited from community support forum] @deamer.org address for the Deamer.org website But to day I am completely block our by Fire fox for even getting to Deamer.org and I get this message Did Not Connect: Potential Security Issue

Firefox detected an issue and did not continue to 408916.svc.e1m.net. The website is either misconfigured or your computer clock is set to the wrong time.

It’s likely the website’s certificate is expired, which prevents Firefox from connecting securely.

What can you do about it?

408916.svc.e1m.net has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site.

The issue is most likely with the website, and there is nothing you can do to resolve it. You can notify the website’s administrator about the problem.

Learn more…

At your recommendation I signed up to Ad Avoid and now FireFox tells me that I could/should not access BT.Com because of the certificate issued by Ad Avoid

I encountered a problem: when trying to open the Prohoster.info website on my computer, a notification appears that the connection is not secure. I don’t understand how to fix this error and what needs to be done to gain access to the hosting?

Secure Connection Failed

The connection to www.tab.com.au was interrupted while the page was loading.

   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.

Secure Connection Failed

An error occurred during a connection to cow.huntforenenst.com. Peer received a valid certificate, but access was denied.

Error code: SSL_ERROR_ACCESS_DENIED_ALERT

   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.

When browsing, I sometimes (more often than not) get a Secure Connection Failed message. The Try Again tab clears the problem sometimes (not that often). This problem has just started happening in the last week, during which I have not made changes to any settings in Firefox. This problem does not exist using other search engines for the same site that I am trying to access, and I note that I also get this same failure when trying to access some Firefox webpages. Is there a fix to this other than contacting the web site owner, which I doubt is the cause of the problem, or for ease and simplicity should I just change to another search engine that does not have the problem?

I have been having a problem with downloading a paper for reviewing from Nature Springer. However, it has been always failing. I have all the help from the website but it work. It always appears as shown below

Secure Connection Failed

An error occurred during a connection to reviewer-feedback.springernature.com. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

   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.

Loading website for BacaPoa.frontsteps.com does not work, now fails ("not secured") . This is business site I have for years.? [windows 11] Is the a bypass or override I can do? JR

Firefox will not allow me to connect to a portal I've been using for years. It gives a "SEC ERROR REVOKED CERTIFICATE" I can connect using another browser. What's up?

Firefox detected an issue and did not continue to www.epos.mp.gov.in. The website is either misconfigured or your computer clock is set to the wrong time.

www.biharcommercialtax.gov.in not excess. show every time when we login sho this web site not secure.

Give me back my access to irccloud.com. I have been using that website for over 5 years on FireFox and then this morning you denied me access. Thanks for checking and correcting.

got a new computer. Geek Squad added my firefox, but it now won't allow my worlplace (Lowes) for schedules and pay.

Secure Connection Failed

An error occurred during a connection to lius.myloweslife.com. Peer reports it experienced an internal error.

Error code: SSL_ERROR_INTERNAL_ERROR_ALERT