Firefox Community Forum

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

I have an website which I prior to this error message have visited many times on Firefox and had no problems. Recently though around two days ago I noticed that I couldn't get in and was met with the following message "Warning: Potential Security Risk Ahead". I can't bypass it apparently and I really need to be able to access this site as it's a University site.

I can access the site on other browsers such as Chrome and Edge but I use Firefox as my default browser and I'd like to keep it that way. I'd appreciate any help I can get.

Said link: https://canvas.gu.se/

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 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…

Untill last night i could conect with that site https://imtw.ru and its sub forums without eny problem . Today when i press the link i recieve a message that the connection is rejected "Failure to secure connection". As you van see it has the https:// infront and i repeat i was able to connect last night. What may be wrong?

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 confirmed with my host provider that my website is in a secure environment, but when I access three form pages that end in "php" there is a broken padlock icon in the address bar and says that the connection is not secure.

I checked other browsers (Edge, Chrome, & Brave) and all show a secure connection. So this only happens in the Firefox browser (v141.0). I'm using Windows 10 64bit.

Has anyone else had this issue? Any suggestions on how to fix?

The form is how my clients order on my website (no financial info is entered on the form, just data), and I fear that if they are using Firefox and see it's "not secure" they will leave.

I read the The Times in the UK and have no problem viewing on my iPad and Google Pixel phone using the Firefox browser. However on my laptop using Firefox I get a screen that says Secure connection failed and recommends contacting the vendor as there is no workaround. On microsoft Edge there is no problem I like Firefox but for me this is a major limitation. Any ideas or suggestions welcome

Hi, Since three or four months, whenever I log into Outlook live, either on Mac or Windows PC, I get a security warning saying that the information will not be secure (Please see attachment.) When I log into the same account, from Edge for example, I do not get the warning popup. I really enjoy using Firefox and would love to continue but this case is worrying me a bit. Any idea to help? Thank you very much, Mathieu B.

I have been receiving several similar emails that disrupt my email use. How do I remove from my computer? Here's an example: An error occurred during a connection to 6yv5qzb7f8.boats. 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

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.

When trying to access many popular websites with Firefox on my Fedora 43 installation, I am greeted with a security warning page with the SEC_ERROR_UNKNOWN_ISSUER error. For most of these websites I can simply accept and continue, but HSTS-only sites will not permit this.

Affected websites include but are not limited to (based on exceptions in the certificates section of Firefox settings):

• github.io (many subdomains)
• purdue.edu (many subdomains)
• iu.edu
• ebay.com
• cbsnews.com
• iwm.org.uk
• home.cern
• celestrak.org

Any help in resolving this is appreciated.

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 ?

I get the following message when try to get https://webmail-oxcs.register.com./:

Secure Connection Failed

An error occurred during a connection to webmail-oxcs.register.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.

I can bring up https://webmail-oxcs.register.com./ with Edge.

Learn more…

My laser printer will not print due to low toner. However, when I click on "more information" to find out the toner level, that site is shown as unsecure and cannot be accessed.

Subject: Urgent Assistance Needed with Certificate Installation

Dear Team,

I hope this message finds you well. I am in urgent need of assistance regarding a Linux-based system where we have the Firefox browser installed. I need to establish a secure connection with one of my servers, which requires the installation of a certificate.

However, I am unable to locate the certificate export button in the certificate view or anywhere else in the browser. I have tried several methods without success.

Could you please help me with this issue as soon as possible? Your guidance would be greatly appreciated.

Thank you very much!

Best regards, Kishor

Can’t login to EFTPS.gov using Firefox and Login.gov. I receive an SSL error message.

Kính gửi đội ngũ hỗ trợ Firefox,

Tôi hiện đang sử dụng iPhone 15 và đã cài đặt phiên bản mới nhất của Firefox. Tôi cũng sử dụng VPN qua ứng dụng Secure Access, được công ty cấp chứng chỉ trên thiết bị di động.

Trước đây, khi sử dụng phiên bản Firefox cũ hơn, tôi có thể bật VPN và truy cập trang web nội bộ của công ty mà không gặp vấn đề gì. Tuy nhiên, kể từ khi cập nhật lên phiên bản Firefox mới nhất, tôi không thể truy cập trang web đó nữa. Thỉnh thoảng, Firefox hiển thị lỗi "This Connection is Untrusted", có biểu tượng "Visit site anyway", và khi tôi nhấp vào, tôi có thể vào được.

Do trang web nội bộ của công ty đang sử dụng phiên bản SSL cũ và không thể thay đổi, tôi cần tìm một giải pháp để tiếp tục sử dụng VPN và truy cập trang web nội bộ như trước đây.

Mong đội ngũ hỗ trợ Firefox giúp tôi tìm cách khắc phục vấn đề này. Trân thành cám ơn