Firefox 社群討論區

Hello I have reinstalled my firefox on a new reinstall of windows 10 as my older version 10 crashed and went to the wall. however I have all my tabs and fafourites up and running but when i try and download my paid version of Nord VPN firefox comes back and says its not secure and wont load the website ? this has been working for me in the past. any advise would be greatfully accepted. thank you.

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?

12 hours ago Firefox stopped working .No reason ; no changes just the following message including access to this site.So now I have to access with edge . 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.

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???

Whenever I try to open Github specifically I get:

Websites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for github.com. The certificate is only valid for the following names: cloudflare-dns.com, *.cloudflare-dns.com, one.one.one.one

Error code: SSL_ERROR_BAD_CERT_DOMAIN

I spent time looking into this, used a new IP address and tried updating the certificate for github, however I'm not particularly skilled when it comes to this, so any assistance would be much appreciated.

Got this error: Your connection may not be private An app or service may see your encrypted traffic from this site. Learn more

Now I know what may be causing it but you offer no solution.

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

Hi, I try to use Firefox for my job and faced with the problem that I can't open state owned website due to sertificate signature error. I ready to take a risk but I can't find the button "Proceed.. (Risky)". This button simply not showing. In th same time in mobile version I saw this button, could take permssions myself and open the website. I tryed to add root and sub sertificates of the Goverment, tryed to add the site address to exclusions -- all these steps don't work. I can't open the site and can't find button "Proceed.. (Risky)". Moreover, in the same time, I can open this website without any questions and problems with Safari and Chrome.

I use the last Firefox version (153.0) from Firefox official website.

How can I resolve this problem in Firefox? Please help me

When I bring up the certificate-expired URL

<https://oaklandwiki.org/>

in Firefox 149.0 on Windows 11 I am told "You have added a security exception for this site." But not how to remove it. How do I do that? I did not see anything in Settings or about:config; did I miss it?

Hello,

The website I log in for internet banking (https://www.sparkasse-rhein-maas.de/de/home.html) is shown as written in brackets when opened in Edge, but as www.sparkasse-rhein-maas.de/de/home.html when I open it in firefor. And Firefox tells me it's not safe when I want to log in. BUT - as I've only just discovered when I copied and pasted it in here - when copied it shows as https://www.sparkasse-rhein-maas.de/de/home.html, so safe after all? How can that be? I hope there's a good explanation.

Thanks in advance Bettina

Moderator note: This question has been edited to correct the formatting.

I have a home server 192.168.0.240 in my local network. Firefox does not let me in to my own pages. On the address line appears text "Not secure",

I have found no way to get in. I have there REALLY IMPORTANT TOOLS AND MATERIAL and I need it AS SOON AS POSSIBLE !!!!

This is really stupid. I have used these pages until this weekend. I have had this problem many years, but always found some way to make it work. I am NOT going to buy a certificate to every server I have home. it costs $$$$.

Hi is many day i try to connect to chatgpt but return me this , (see attach foto ), is possible remove a check controll of certificate , is very useless and boring

thanks

I am getting a message that secure connection failed, it is happening for Amazon.com and maybe netflix as I can't log on or access the sites

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?

Beginning today, I suddenly cannot access numerous websites when I use Mozilla Firefox 151.0.2. Examples include Amazon, and Google, et al. Attempts to do so consistently fail at the point of performing a TLS handshake, when I am advised that "secure connection failed". Kindly refer to the attached screenshots. I have no difficulty whatsoever accessing the same websites when I use other browsers, such as Google Chrome and MS Edge. I previously had Mozilla Firefox enabled as my default browser, but I have had to change this, given these "challenges". Please advise how I can fix this. Best regards and many thanks.

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 - - -

I cannot get past the secure connection failed! I have cleared cookies, cache, etc. I have turned off the firewall, and restarted my computer more times that I can count....