Firefox-mienskipsfoarum

I've never had Secure Connection Failed warnings before, but now I am getting them often. I don't want to stop using Firefox, but it seems I can get to these sites via other browsers.

Доброго времени суток.

Я установил сертификаты по инструкции, которая лежит на s.sber.ru/70VQ2B . После этого не прогружается полностью окно входа на online.sberbank.ru (не видно содержимого фреймов). Проблема полностью аналогична описанной здесь: https://support.mozilla.org/ru/questions/1597415

Firefox ESR115.40 (64-разрядный, Windows 7) - страница выглядит, как на скриншоте по ссылке выше.

Установлены скачанные сертификаты в самом браузере, они отображаются в разделе Управление сертификатами -> Центры сертификации. После этого абсолютно ничего не изменилось.

Может, надо еще что-то сделать? Или на Firefox ESR115.40 вообще работать не будет? До перехода на сертификат от Минцифры России проблем не было.

Secure Connection Failed

An error occurred during a connection to my.amarkets.org. SSL received a record that exceeded the maximum permissible length. Advanced What makes the site look dangerous?

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. What can you do about it?

Please contact the website owners to inform them of this problem.

Learn more about secure connection failures

Error Code: SSL_ERROR_RX_RECORD_TOO_LONG

I was going to look at a friend's website that has an SSL-certificate, has had it for years, which has been working all that time. Now Firefox informs me: "Firefox doesn’t trust this site because its certificate isn’t valid for www.wuwei-school.nl. The certificate is only valid for: wuwei-school.nl."

Really? I pretty sure there's nothing wrong with the certificate and I was taught that the "www" component is not important as a prefix for the domain name in a URL. It is just a shorthand code to show that the address is a URL. Can Mozilla fix this issue? Or, at least, explain?

Thanks

Firefox's full message: - - - Be careful. Something doesn’t look right.

Firefox spotted a potentially serious security issue with www.wuwei-school.nl. Someone pretending to be the site could try to steal things like credit card info, passwords, or emails. Advanced What makes the site look dangerous?

The site is set up to allow only secure connections, but there’s a problem with the site’s certificate. It’s possible that a bad actor is trying to impersonate the site. Sites use certificates issued by a certificate authority to prove they’re really who they say they are. Firefox doesn’t trust this site because its certificate isn’t valid for www.wuwei-school.nl. The certificate is only valid for: wuwei-school.nl. What can you do about it?

Probably nothing, since it’s likely there’s a problem with the site itself. Sites use certificates issued by a certificate authority to prove they’re really who they say they are. But if you’re on a corporate network, your support team may have more info. If you’re using antivirus software, try searching for potential conflicts or known issues.

View the site’s certificate

Learn more about secure connection failures

Error Code: SSL_ERROR_BAD_CERT_DOMAIN

Aug 21, 2026 11:10:31 PM GMT+2 - - -

My virus program is sedning me this message.

firefox.exe attempted to establish a connection relying on an unmatching security certificate to email.squarespace.info. We blocked the connection to keep your data safe since the used certificate was issued for a different web address than the targeted one.

How do I stop firefox from contunally reaching out to this web site.

I periodically need to access a website with an expired or self-signed certificate. I understand the risks, but the browser won't let me. I've searched both the regular settings and about:config, but I can't find an option to restore the button to ignore the warning. How can I ignore the SEC_ERROR_BAD_SIGNATURE notification and proceed to the website I need?

If I try to log into my router at 192.168.1.1 I get a message that says "Warning: Potential Security Risk Ahead". I expect that, but when I click on the Advanced button it doesn't do anything. Works fine with Chrome, so not my router or anti-virus. ???

Windows 10 Firefox 148.0

It used to be possible to proceed if I clicked on "Advanced", However, I can no longer do this with the latest update of Firefox. It's this site: link text

When I try to search for something on Google using Firefox, I keep getting the message "cloudflare web-find.net has expired."

What is this and how do I get rid of it?

Apparently, I need to switch to Chrome, because I don't get it there!

Angie

I am trying to access the FoodsCo website, a division of Kroger and I get a page saying that the "authenticity of the received data could not be verified."I cannot go the page at all (screenshot of what I get when I try to access foodsco.net). I checked the same page on Chrome and the page shows up fine and the connection is secure (the website literally has https in it. The S stands for secure). I have tried to add foodsco.net to the exempt list through Enhanced Tracking Protection, but it didn't work. This isn't some dark web site, it's connected to the biggest grocery chain the U.S. I'm very confused here. What is happening?

Secure Connection Failed

An error occurred during a connection to feg.uh1.ac.ma. SSL received a record with an incorrect Message Authentication Code.

Error code: SSL_ERROR_BAD_MAC_READ

Hello!

For few minutes it says "Performing a TLS handshake to youtube.com", then this message appears:

==

Secure Connection Failed

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. What can you do about it?

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.

==

What I did so far:

1. Deleted cache and site data for youtube.com. 2. Checked if date and time setting is set to auto and synced it just in case. 3. Tried restarting firefox in safe mode. 4. Tried turning off ocsp stapling. 5. Deleted ALL cache and site data. 6. Tried creating a new profile. 7. Set HTTPS-only mode to "don't enable" and added youtube.com to exceptions

I do use DoH. I can't not use it. YT won't work without it for sure. Provider is google: https://dns.google/dns-query

Everything works fine in Chrome (yes, I use DoH there too).

To be honest. Firefox is starting to be a big pain to use. I'm starting to see more and more of this screen where it say's "Be careful. Something doesn't look right" Even when i go to the advance and say proceed. Nothing happens and i'm getting no where. I know many of the sites don't have anything to do with asking for credit card, Scam or even having popup's. I test the sites in other browsers and there work without any issues. But Firefox is starting to lock me out of many sites due to this. How can i make this stop. As i used Firefox for many years.

The sample that is in the screenshot is a Anime data base that i have also used for years. But today shows this. But was working fine yesteday. What is going on and how can i fix it. So i can start using the browser that i love on the sites i want to.

I was browsing for vacant jobs in LinkedIn and ended up on this page: https://www.linkedin.com/jobs/view/4400116024/?trackingId=&refId=&midToken=AQHkKqfITpiwdw&midSig=2f8JsuceFtMYc1&trk=eml-email_jobs_application_rejected_01-similar_jobs-0-similar_job&trkEmail=eml-email_jobs_application_rejected_01-similar_jobs-0-similar_job-null-g3nlj~mo2hn6z8~of-null-null&eid=g3nlj-mo2hn6z8-of&otpToken=MTAwMjFlZTQxNjJhYzljM2JlMmYwMmVkNDAxYWU3YjA4NmNiZDQ0MzlkYWQ4NTZjNzljMTAxNjg0ZjU4NWZmM2YzZGZiN2JjNTVjNWZjZTc3YjhmZDg3ZWQ5YTExZWUyMDg1N2Q1YzI4OGNjNDU0MjU3YTEsMSwx But pressing the Apply button, did not take me to the application page, but instead a page that was saying: "Be careful. Something doesn’t look right. Firefox spotted a potentially serious security issue with jobs.tuvsud.com. Someone pretending to be the site could try to steal things like credit card info, passwords, or emails." And there was no option to ignore this and just go to the site??? I needed to open MS Edge instead, to be able to apply for the job???

What do I do if Firefox wont let me log into my account on a website because the "certificate has been revoked"? I think it has to do with the "enhanced tracking protection" setting.

This is what the advanced message is:

Be careful. Something doesn’t look right.

Firefox spotted a potentially serious security issue with digital.bluefcu.com. Someone pretending to be the site could try to steal things like credit card info, passwords, or emails. Advanced What makes the site look dangerous?

Firefox is warning you about this site because the certificate provided for digital.bluefcu.com has been revoked and isn’t trusted anymore.

https://links2.pennplaycasino.com/a/sc/Ejymm6nlCfCBvpYwfINgrJ6SolopjLt2pPzahls4XFI9CAiWFEU-NRMzO2QGXCsw1tuPuSVZNolCWZx1Saeq8jqSroS6PDiIDG8iXeqIHwu89Eneof7SgD45m1NGoV1yTTkTPw8crZrtpnwD0HWvXYe8hdAOe2Hpkm8AIIMcnD6J0w-fJMAu-EW6F-E92YW7hf5W6sAhj7Zzg8-4PzBHZBiRIwd-HKo_kKnmnl29t6RiEof8oudRukkD6hhEIJ_AQAVc6MOkx1ohTbVAmtXsSp2zVz3QNGLGlw4NCI0rQPlPn9UOF08747S2Y27gRU1ewafNV8xkZCSZVKrDuIyrX8Dui5VGrt6x7jbG_vEvjw55Fk8W3WWewF9yZsi2fsDJDSkus2BmZud_-pLn/MvxUIrQMSnua6eaTcfr4mxxPB3WMWr_I/18

Peer’s Certificate has expired.

HTTP Strict Transport Security: false HTTP Public Key Pinning: false

Certificate chain:

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Please fix it it is my fav gaming

An error occurred during a connection to ms.now. 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…

Firefox detected a potential security threat and did not continue to apps.ngte-welfaretrust.gov.bd because this website requires a secure connection.

What can you do about it?

apps.ngte-welfaretrust.gov.bd 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.

''''Was connected with Montana Dinner menu Charlottetown, PEI and the following popped up???? '''' Secure Connection Failed

The connection to www.montanas.ca 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.

What should I do, this has never happened before??????

My university website (brightspace) is blocked by "Warning: Potential Security Risk Ahead" and clicking advance does not allow me to continue. I was using brightspace when it suddenly became blocked and I have received errors stating it was an HSTS error to now an expired certificate. I have tried to restart Firefox and clearing the website from my history and clearing cache, but nothing worked so far. Accessing this website has only been an issue on my Firefox on my laptop. The website's servers is not having issues, my other devices can access it flawlessly, and using other web browsers on my laptop does not cause any issues. I would like not to switch my browser, so any help to accessing this website would be greatly appreciated