I-Firefox Community Forum

All of a sudden I am getting loads of SPAM emails and when I try to unsubscribe, I get a Secure Connection Failed error. I have marked them as SPAM but they just keep coming, daily.

Hello, I run a movie and drama-related website: https://tvmon.com.co/. Recently, I’ve noticed that Firefox occasionally throws the following error when trying to access the site:

"Secure Connection Failed An error occurred during a connection to tvmon.com.co. . The OCSP response contains an invalid signing certificate. Error code: SEC_ERROR_OCSP_INVALID_SIGNING_CERT"

This issue is very strange because:

1. The site loads fine in Chrome, Edge, and Safari.

1. My SSL/TLS certificate is valid, up-to-date, and passes external tests (SSL Labs, etc.).

1. The error only appears occasionally in Firefox, refreshing sometimes fixes it, sometimes not.

1. Hosting and server logs show no issues at all.

I suspect this is related to Firefox’s stricter OCSP validation, but I’m not sure how to debug or resolve it. Since my site streams drama and movie content, this error is frustrating for users who rely on Firefox.

Has anyone else experienced this intermittent OCSP signing certificate error? Is there a known fix or workaround for Firefox-specific validation issues?

Secure Connection Failed

An error occurred during a connection to sandiego.thepermitportal.com.

   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.

What can be done about this?

JF

Hi,

Youtube won't even load on my computer anymore....this is the message I get when I try.

Secure Connection Failed

An error occurred during a connection to www.youtube.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_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.

Learn more…

i need to access my aol and yahoo email like i was always able to do using firefox. now it states security risk and "nothing " you can do? please advise . i need access to my desktop to easliy see my emails and don't like using my phone

When I try to access the Newsmax website, I get a black screen with the message which says,

"Secure Connection Failed The connection to www.newsmax.com 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." 

I have no problem accessing other sites, so what can I do to get the resolved?

Hello, This is Fr. Sakala, a Catholic priest. I have been trying to re-log in a regular site, hyella.com.ng, but could not access it.

I know it is a very secured and delicate site, but help me log in. Thanks!

An error occurred during a connection to portal.esic.gov.in. SSL received a record that exceeded the maximum permissible length.

Error code: SSL_ERROR_RX_RECORD_TOO_LONG

   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.

I try to connect to a web site but I get this response:

"Secure Connection Failed An error occurred during a connection to help.wned.org. Cannot communicate securely with peer: no common encryption algorithm(s). Error code: SSL_ERROR_NO_CYPHER_OVERLAP

   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."

"

I get the "Secure Connection Failed" when trying to go to a web site.

I know the web site is fine. You have stopped offering the "Go anyway" button!

https://thebougainvillahouse.org/

... it's a 503 charity we give money to.

Fred

My anti-virus reports that 30 to 100 times per day, it blocks firefox.exe attempts to establish a connection relying on an expired certificate to to www.temu.com. Can you please stop your attempts ? Or tell me how to stop them ?

Bitdefender security software Online Threat Prevention "Notifications" are blowing up stating the following: "firefox.exe attempted to establish a connection relying on an untrusted certificate to incoming.telemetry.mozilla.org"

The issue began approximately 17:00 UTC November 16, 2025

Please investigate & update the certificate or we may need to move to a different browser.

Screenshot submitted.

D.

Secure Connection Failed

An error occurred during a connection to insights.lfx.dev. Cannot communicate securely with peer: no common encryption algorithm(s).

Error code: SSL_ERROR_NO_CYPHER_OVERLAP

   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.

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 am subscribint to TheHybridLayer.com and the video requires access to player.vimeo.com. Unfortunately, the pop up message is saying that "Did Not Connect: Potential Security Issue." Please help me address the issue since I overwhelmed with this.

Current situation : I am using Macbook Air 11" 2015, MacOS Catalina, Firefox 145