I-Firefox Community Forum

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 have started receiving a secure connection failed error message for a portal log-in website that worked fine for the past 6-7 months (see attached document). Other people in my group use Firefox and Bitdefender to access the portal and none of them are having this issue.

I originally believed the problem to be my anti-virus (Bitdefender) and worked with them to resolve the problems. After trying various solutions including clearing my cache, using private mode and turning off different components of their software, Bitdefender believes the problem is with my browser setting and not their software. I also tried accessing the portal using Chrome in both regular and incognito modes and cannot access the site which would seem to rule out the problem being a Firefox browser problem but contacting Firefox support seems to be the next logical step.

I have been to the Firefox FAQ and saw similar problems with potential solutions - DNS over HTTPS, TLSKEYLOGGING issues, add-on exceptions - none of which worked. I have the most recent version of Firefox and am running Windows 11 home version.

Sometimes if I hit refresh after receiving the error message, the browser will try to connect and I will get a server time out message. If I keep hitting "try again", sometimes the portal log-in screen will appear and allow me to log-in. The key word is "sometimes" since often I just keep getting the server time out message.

Any ideas for me to try from this forum?

Site: https://www.thegamer.com Firefox refuses to load the site, it does not even show the certificate when clicking on the lock. Using the certificate manager, add exception does not work too, it just refuses to store the certificate. But at least THERE I can VIEW the certificate, which proves it is valid and FIREFOX is at fault:

https://www.ssllabs.com/ssltest/analyze.html?d=www.thegamer.com&latest shows "IO exception" when trying to check the CRL, but gives an A+. Yet Firefox does not even give me the "Continue anyway" possibility. This it tiering, I hate using google chrome based browsers, but of course, it works there. Server 2025, only MS-defender at its default settings.

Subject Name Common Name thegamer.com Issuer Name Country US Organization Let's Encrypt Common Name E8 Validity Not Before Mon, 13 Oct 2025 23:03:42 GMT Not After Sun, 11 Jan 2026 23:03:41 GMT Subject Alt Names DNS Name

• .thegamer.com

DNS Name thegamer.com Public Key Info Algorithm Elliptic Curve Key Size 256 Public Value 04:0E:95:16:C4:A2:23:9D:81:AD:D7:70:4C:4B:A5:F7:68:0E:33:E2:A0:1C:81:6D:0F:1C:F5:C8:EF:5B:C8:64:AD:15:86:5D:5E:E6:FA:A6:DB:41:86:A5:F0:28:7A:45:F4:8D:75:B3:18:43:E9:0F:7C:75:10:AE:F8:A0:04:7B:D5 Miscellaneous Serial Number 06:6C:A7:00:7C:ED:C0:50:E2:FD:4F:6C:A0:8C:0F:86:2B:AD Signature Algorithm ECDSA with SHA-384 Version 3 Download PEM (cert)PEM (chain) Fingerprints SHA-256 D0:D5:E8:73:9E:6D:B1:2D:EC:5D:47:0D:70:BF:58:1C:AC:A5:D3:89:20:6D:54:15:09:E8:42:9C:82:F7:4F:8F SHA-1 53:E6:54:B5:37:0F:4B:23:BE:73:8A:6B:37:6B:BE:A6:A5:86:E4:5B [This extension has been marked as critical, meaning that clients must reject the certificate if they do not understand it.] Basic Constraints Certificate Authority No [This extension has been marked as critical, meaning that clients must reject the certificate if they do not understand it.] Key Usages Purposes Digital Signature Extended Key Usages Purposes Server Authentication, Client Authentication Subject Key ID Key ID 53:6A:02:33:30:1C:AD:4D:3B:F2:9F:4D:6D:E4:33:26:31:69:8F:61 Authority Key ID Key ID 8F:0D:13:A2:F6:2E:7E:D1:50:6C:33:18:38:5D:59:8E:23:72:91:CA CRL Endpoints Distribution Point http://e8.c.lencr.org/46.crl Authority Info (AIA) Location http://e8.i.lencr.org/ Method CA Issuers Certificate Policies Policy Certificate Type ( 2.23.140.1.2.1 ) Value Domain Validation Embedded SCTs Log ID 0E:57:94:BC:F3:AE:A9:3E:33:1B:2C:99:07:B3:F7:90:DF:9B:C2:3D:71:32:25:DD:21:A9:25:AC:61:C5:4E:21 Signature Algorithm SHA-256 ECDSA Version 1 Timestamp Tue, 14 Oct 2025 00:02:12 GMT Log ID 19:86:D4:C7:28:AA:6F:FE:BA:03:6F:78:2A:4D:01:91:AA:CE:2D:72:31:0F:AE:CE:5D:70:41:2D:25:4C:C7:D4 Signature Algorithm SHA-256 ECDSA Version 1 Timestamp Tue, 14 Oct 2025 00:02:12 GMT

Subject Name Country US Organization Let's Encrypt Common Name E8 Issuer Name Country US Organization Internet Security Research Group Common Name ISRG Root X1 Validity Not Before Wed, 13 Mar 2024 00:00:00 GMT Not After Fri, 12 Mar 2027 23:59:59 GMT Public Key Info Algorithm Elliptic Curve Key Size 384 Public Value 04:D1:65:F2:5E:DC:4B:B4:0C:02:9C:D2:B2:FA:EE:E9:6C:AB:3A:AE:38:A1:F4:D4:39:32:33:C5:42:D4:CC:33:0C:34:C7:21:20:90:70:5C:E8:62:2F:1C:71:B3:42:D7:79:BE:46:0D:C1:DB:47:A1:13:A0:C7:DF:81:26:63:3B:D4:8D:1D:F6:3D:82:33:32:F6:F4:2B:E7:F5:96:3A:B4:13:67:18:7B:6B:3E:8D:48:D9:EA:DE:ED:AE:6D:3E:87:4C Miscellaneous Serial Number 63:95:93:63:C2:4E:70:82:71:59:18:BF:C3:D7:ED:56 Signature Algorithm SHA-256 with RSA Encryption Version 3 Download PEM (cert)PEM (chain) Fingerprints SHA-256 83:62:4F:D3:38:C8:D9:B0:23:C1:8A:67:CB:7A:9C:05:19:DA:43:D1:17:75:B4:C6:CB:DA:D4:5C:3D:99:7C:52 SHA-1 54:31:7E:B0:76:5F:0B:C6:74:85:51:84:EB:83:74:B4:19:9E:46:55 [This extension has been marked as critical, meaning that clients must reject the certificate if they do not understand it.] Basic Constraints Certificate Authority Yes [This extension has been marked as critical, meaning that clients must reject the certificate if they do not understand it.] Key Usages Purposes Digital Signature, Certificate Signing, CRL Signing Extended Key Usages Purposes Client Authentication, Server Authentication Subject Key ID Key ID 8F:0D:13:A2:F6:2E:7E:D1:50:6C:33:18:38:5D:59:8E:23:72:91:CA Authority Key ID Key ID 79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E CRL Endpoints Distribution Point http://x1.c.lencr.org/ Authority Info (AIA) Location http://x1.i.lencr.org/ Method CA Issuers Certificate Policies Policy Certificate Type ( 2.23.140.1.2.1 ) Value Domain Validation

Subject Name Country US Organization Internet Security Research Group Common Name ISRG Root X1 Issuer Name Country US Organization Internet Security Research Group Common Name ISRG Root X1 Validity Not Before Thu, 04 Jun 2015 11:04:38 GMT Not After Mon, 04 Jun 2035 11:04:38 GMT Public Key Info Algorithm RSA Key Size 4096 Exponent 65537 Modulus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iscellaneous Serial Number 00:82:10:CF:B0:D2:40:E3:59:44:63:E0:BB:63:82:8B:00 Signature Algorithm SHA-256 with RSA Encryption Version 3 Download PEM (cert)PEM (chain) Fingerprints SHA-256 96:BC:EC:06:26:49:76:F3:74:60:77:9A:CF:28:C5:A7:CF:E8:A3:C0:AA:E1:1A:8F:FC:EE:05:C0:BD:DF:08:C6 SHA-1 CA:BD:2A:79:A1:07:6A:31:F2:1D:25:36:35:CB:03:9D:43:29:A5:E8 [This extension has been marked as critical, meaning that clients must reject the certificate if they do not understand it.] Basic Constraints Certificate Authority Yes [This extension has been marked as critical, meaning that clients must reject the certificate if they do not understand it.] Key Usages Purposes Certificate Signing, CRL Signing Subject Key ID Key ID 79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E

Hello, I am facing a very strange and frustrating issue with my website https://biografieblick.de/, and it is only happening on the firefox browser other browsers like chrome, edge or safari are loading the site perfectly fine. The Issue is it occurs occasionally, Yeahh IDK why. When I try to visit my site, Firefox gets stuck on a screen that says "Checking if the site connection is secure" and it looks like an loop sometimes.

This looks exactly like a cloudflare turnstile loop but I am NOT using cloudflare. I have double checked my DNS records and explicitly confirmed this with my web hosting provider. This block only triggers when using firefox.

I have never ever had a problem getting into my bank account until this evening.

Says it is insecure.

How can this happen? I really need to get into my account!

Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to nrega.nic.in because this website requires a secure connection.

What can you do about it?

nrega.nic.in 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.

Probably nothing, since it’s likely there’s a problem with the site itself.

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.

Hi Love Firefox and use it every day to manage clients Google Ads accounts. Updated to latest version and now I'm getting this warning when I'm trying to access ads.google.com Doesn't appear that I can add an exception, is there a work around that I can use. Look forward to hearing back. Thanks in advance

Paul

https://e-nidhi-v2.bihar.gov.in/rms-portal-ui/rms_ReceiptCreation?encData=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&merchant_code=REGISDEPT

Peer’s Certificate issuer is not recognized.

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

Certificate chain:

MIIHITCCBQmgAwIBAgIPe9HbuzjrJVIH/vX63YhtMA0GCSqGSIb3DQEBDAUAMFMx CzAJBgNVBAYTAklOMSUwIwYDVQQKDBxlTXVkaHJhIFRlY2hub2xvZ2llcyBMaW1p dGVkMR0wGwYDVQQDDBRFTSBEViBUTFMgQ0EgLSBHMkEtMTAeFw0yNTEwMDMxMTMw MzhaFw0yNjEwMjgxMTMwMzhaMBkxFzAVBgNVBAMMDiouYmloYXIuZ292LmluMIIB IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuGmKn0XZAyekVrpXOZbaqwZq db2M18Z26Xv5oWljfLD8eBFQxjQMGtL5C/+lLarXCvr2F2CRA7Xp7Fyj7VLFeAmJ j2z6QMucxpHa13bRkBXy/lqurC4J4stfsMhtL5RWsztSsRtnAoPwbopgWvw/BDnW 0bh7E8pOUY1ePz577iRDj3WGVUryTa33HiAvEJdPmUB4XiiYBMIZhyl6x7iS9NQj gOg5quPNI2YI1NwrD7vB20/6t63muTkVCD4LGdb0+yotQn7DQ0MyA5oATifHCWpD fS1N5+7jSaTqPgPpz+8KV8gpHieO2a1Omz3icjJk8uT6O9/mJYAKK2wx2WgDpQID AQABo4IDKjCCAyYwHwYDVR0jBBgwFoAUE1weGJYNA3nLBAmvj50U0C6223AwHQYD VR0OBBYEFJuz/Oeksa16P2P29qOoAckGUTaVMBMGA1UdJQQMMAoGCCsGAQUFBwMB ME8GA1UdIARIMEYwOgYMKwYBBAGDjiEBAAEBMCowKAYIKwYBBQUHAgEWHGh0dHA6 Ly9yZXBvc2l0b3J5LmVtc2lnbi5jb20wCAYGZ4EMAQIBMHgGCCsGAQUFBwEBBGww ajAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AtYS5lbXNpZ24uY29tMEIGCCsGAQUF BzAChjZodHRwOi8vcmVwb3NpdG9yeS5lbXNpZ24uY29tL2NlcnRzL0VNRFZUTFND QUcyQTFFRS5wN2MwOAYDVR0fBDEwLzAtoCugKYYnaHR0cDovL2NybC5lbXNpZ24u Y29tP0VNRFZUTFNDQUcyQTEuY3JsMCcGA1UdEQQgMB6CDGJpaGFyLmdvdi5pboIO Ki5iaWhhci5nb3YuaW4wDgYDVR0PAQH/BAQDAgWgMAwGA1UdEwEB/wQCMAAwggGB BgorBgEEAdZ5AgQCBIIBcQSCAW0BawB3ANgJVTuUT3r/yBYZb5RPhauw+Pxeh1Um DxXRLnK7RUsUAAABmanWpcUAAAQDAEgwRgIhAO10xa+Gco+QGukLk1vRoEl88r2x eIJNe/hkH2AL7b6dAiEA/gp3Cw0Lr1QMDsZE4hc+fuDfJ8atDBdUMpZAeZkNevEA dwDLOPcViXyEoURfW8Hd+8lu8ppZzUcKaQWFsMsUwxRY5wAAAZmp1qtrAAAEAwBI MEYCIQDwG25Z2OCbiH8wVer36fVvfeJJiAG4i3LLSdNi9IfiEQIhAK2VZFgXFWd+ FTv3uazObtb5uicEUBVVwTpk/9cLoOMzAHcArKswcGzr7IQx9BPS9JFfER5CJEOx 8qaMTzwrO6ceAsMAAAGZqda2UgAABAMASDBGAiEA8AIF2gnkDl9r6HsYTATYbvzQ g/lq5i8B/MqENBs5dkwCIQC05B2VIIKRq185Z9HUiriglD4OeBz+X9ixCZQOseD7 yDANBgkqhkiG9w0BAQwFAAOCAgEABY9VYC2YHUNHebWF54NWm7dp9p86ZNyZyl7m bXNcbmUazeb5L/5qRjgacVdzIK3/BHc50eEtgFfhCjmwrx4vJG1fqRTFrPgPjSfx Sbx1X4tPZE5aMwtsoL+qOZAWARwNQcU2H6q5zAUj5yMNGVwEyIsuaerJBayImYGZ DDv9XPnMqjrwTMAF3sjfnLVEbVf4JrgJzb5cDrOY1BfGFPj3j5gw5cOljjqnGuKi kOdtxtsI2wLxjnHSYRLDl/NiZxaIhgJiCO6alJ44uRv9e2XeYJO4goagiK7lvISb jfqmU1pSEPlivfhKYDWNJ5d07TQjIj24YJnwboko23JneyjnOhqUXyihLp/9LbVI 6ShhvMEyBn2cWd++xnmXcMSdHXmABE3xs+2f7wiFnEIGFxoXiljCnRQ72S18gU9U XjxN1aaeZEC2n1XJh2yFlfXgcdDe2wHQIAnyNIzKpfAIMniDuZbxZS9NmeO6f2wR 4sVucfIQ2GZz6opgp2NGUfv95Yezc6q2emXFsjlySv8ycqiCAFUNwd8AF2BxN9dq FOLn5Nb7faorNG7P+l+DUoK21lNLcuyy0MXhX5Wte3W4WtJstBWAQG6Vm3z9aj7P j8HrnpEJHoEsIpQCn8tDIut69YEj8WC1PjD/ZWQBV6PKdvb7bSlMtuPhwBtJwIXK CI8wXto=

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 $$$$.

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?

Hello, I noticed that when browsing webpages in Firefox, a window periodically appears asking me to confirm a certificate, presumably from a website (roughly called lt3.google). I haven't downloaded anything malicious and I regularly scan my system with an antivirus. Please help and respond. Thanks in advance.

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?

Loading website for BacaPoa.frontsteps.com does not work, now fails ("not secured") . This is business site I have for years.? [windows 11] Is the a bypass or override I can do? JR