Forum der Gemeinschaft Firefox

I am getting the below message when trying to log into the EFTPS site. I have never had this issue before.

Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to www.eftps.gov because this website requires a secure connection.

What can you do about it?

www.eftps.gov 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.

If you are on a corporate network or using antivirus software, you can reach out to the support teams for assistance. You can also notify the website’s administrator about the problem.

Learn more…

Secure Connection Failed An error occurred during a connection to mail.yahoo.com. The OCSP response is not yet valid (contains a date in the future).

Error code: SEC_ERROR_OCSP_FUTURE_RESPONSE

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…

Try Again

Hi : We are planning out server farm capacity, network gear needed, for a new site for our AI micro-services. We are curious when do you think that Firefox will support TLS 1.4 ? and will the overhead/utilization difference be between TLS 1.4 and 1.3 which we currently use exclusively. I understand that we are talking servers, and FireFox is a browser, but we cant dig up any real-world stats on the workload difference between the two. Any help would be appreciated.

Thank you for your time Albert Baker.

How long before Nightly download site is available again?

https://download.mozilla.org/?product=firefox-nightly-latest-ssl&os=linux64&lang=en-US returns:

Did Not Connect: Potential Security Issue

Nightly detected a potential security threat and did not continue to download.mozilla.org because this website requires a secure connection.

What can you do about it?

download.mozilla.org has a security policy called HTTP Strict Transport Security (HSTS), which means that Nightly 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… Websites prove their identity via certificates. Nightly does not trust this site because it uses a certificate that is not valid for download.mozilla.org. The certificate is only valid for the following names: *.bbcollab.cloud, bbcollab.cloud

Error code: SSL_ERROR_BAD_CERT_DOMAIN

Firefox is giving me an error on https://stemgateway.nasa.gov but the site is perfectly accessible using MS Edge and using Firefox on another computer. I uninstalled and reinstalled Firefox, changed the proxy settings to not use a proxy, tested a VPN, and changed DNS servers. Below is a picture of the error and of the certificate which seems to be present in Firefox already.

I have recently received a notice from Mozilla informing me that the Security Certificate for Firefox is set to expire, and if I do not update it, Firefox may develop issues and stop functioning. As I am not very tech savy, and do not understand the language, I do not know igf/how this will affect my system. It is set to update automatically. I have included a screenshot of the notice below. I keep the system simple, and do not use add-ons, etc. Can someone please explain what all this means in laymans terms?

I have been using my email for years and suddenly today this message came up and I cannot access my email because an error message came up. i accessed earlier today and then this message. I use my provider as my home page and it has never been an issue before. The only thing I have changed is I downloaded a codec update. I can still receive emails from this address on my phone. I can still access all the sites I visit except my webmail.This is the full message: An error occurred during a connection to webmail.westnet.com.au. Peer’s Certificate has been revoked.

Error code: SEC_ERROR_REVOKED_CERTIFICATE

I am trying to backup a certificate using certificate manager but I keep getting the error “Failed to create PKCS #12 backup file for unknown reasons” I have tried everything to get this to work

I am new to firefox customization. I need help to understand, how firefox picks up CA certificates from the global ca-certificates path in ubuntu and uses them in their own cert9.db

Currently, what I am trying is, If I have a rootCA certificate (which I generated using openssl), I want to keep it in a specific path, such that when firefox launches, it picks up that certificate and uses it. How can i achieve it.

I have tried using the policies.json, which works. But are there any other ways to achieve it?

I am in Denmark and would like to get access to https://sede.mir.gob.es/opencms/export/sites/default/es/inicio/ when I press Access throug digital signature, It says secure connection failed. To be able to access spanish government sites with my spanish digital signature how to get firefox to approve it? I was tried to add the websites and approved but didn't work. The certificat is installed correctly and tested when I was in Spain. Thank you for your support.

I have a router set up at a remote site with a device that has a built in web server that allows viewing the items displayed. The router quit working so i replaced it with another one with the same configuration but now when I try to access through it The browser is complaining that it is unsecure and apparently resets the connection. I don't care if it is unsecure it is my site/router and I want to connect. I have used this configuration many times with no problems but firefox has done something to prevent it from working anymore, this started being a problem with some of these setups a couple years ago. How do I get it to connect anyway.

Dear all, can you please help? I am trying to login to my bank First Direct. When clicking on First Direct bookmark I receive a error message.

Secure Connection Failed

An error occurred during a connection to www.firstdirect.com. SSL received a record that exceeded the maximum permissible length.

Error code: SSL_ERROR_RX_RECORD_TOO_LONG

Will someone help me get over this? My contact email [edited email and phone# from community support forum] & on WhatsApp. Thanks Albert

So I'm trying to access Greenfly but I'm getting this error message: SEC_ERROR_REVOKED_CERTIFICATE.

Please see attached image as all checks are good for the credentials. I've tried erasing cookies but no luck.

Any other options?

Firefox Nightly | 138.0a1 (2025-03-10) (aarch64) MacBook Pro | M2 2022 | Sequoia 15.3.1

Why are you closing the baked-in cert expiration support thread two days before it happens? Wouldn't it make a whole ton more sense to leave it open during the actual problem period?

https://support.mozilla.org/en-US/questions/1468274