Firefox Support Forum

hi. can anybody explain me the message SEC_ERROR_UNKNOWN_ISSUER when i use connection inside my company

when i add site to exclusion does firefox continue to protect my connection to site by using TLS or firefox stop use TLS and passwords transmit openly?

it is important to understand to me have i install a valid certificate on all my equipment to protect my connection inside the company.

or just add site to exclusion , because i know that certificate have been generated randomly and my connection and passwords to equipment is still by protection TLS.

I am running a 2008 Imac on OS 10.11.6, and using Firefox 77.0.1 (64 bit).

Much of my work is online with one website, which I log onto daily. Today, I was unable to login because I received a "Did Not Connect. Potential Security Issue." I restarted, made sure Firefox was up to date, etc. The problem repeated.

Then I tried the website in Chrome. I got the same thing. I tried it in Safari. I got the same thing.

I called the company and spoke with tech support. He was unable to recreate my problem on his PC or his Mac. He confirmed that there was no certificate issue at the company and that they were not getting any other similar complaints or problems.

I then tried it on a Mac running 10.15, and was able to access the website easily, with no error messages.

My question is: is the problem my computer, and not the browsers or connections? Is there anything I can do short of buying a new computer?

Thanks for the help. Greg

After a successful 2-way TLS handshake, I was able to browse my website for 1-2 times, subsequent requests failed with the "Secure Connection Failed" message and there is no error code to understand what the error is. In Network tab, it showed that Firefox didn't send the request to the web server (request_not_make_to_webserver.png). In Console tab, there was a message of "This error page has no error code in its security info" (console_show_no_error_code_msg.png). There is no issue to connect to my website using Chrome.

Did anyone face this issue before? What could be the cause for such problem?

Thanks, Tuan

Secure Connection Failed

An error occurred during a connection to www.google.com. Peer’s certificate has an invalid signature.

Error code: SEC_ERROR_BAD_SIGNATURE

   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.

Hello,

bellow ca and cert leads to the SEC_ERROR_BAD_DER error in Firefox. In Chrome it works ok. What is wrong?

ca:

MIIGWDCCBECgAwIBAgIUENZtuCf3Tob4s6huBzfC8ZAJkLEwDQYJKoZIhvcNAQEL BQAwUjELMAkGA1UEBhMCUEwxDzANBgNVBAcMBldhcnNhdzEYMBYGA1UECgwPKi5s b2NhbCBkb21haW5zMRgwFgYDVQQDDA8qLmxvY2FsIGRvbWFpbnMwIBcNMjAwOTE1 MTEwODI5WhgPMjEyMDA4MjIxMTA4MjlaMFIxCzAJBgNVBAYTAlBMMQ8wDQYDVQQH DAZXYXJzYXcxGDAWBgNVBAoMDyoubG9jYWwgZG9tYWluczEYMBYGA1UEAwwPKi5s b2NhbCBkb21haW5zMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAyM+E 2qiGxytcwOgedhO5O7jQ1j1eYWic1nPbTJPvusCN48mEmwr8SrrfLtRnbKpql/R1 NxQpHLLnY2Yl+6wyfOa/bSickFr1i6MUhIo8E2QgzcxKz8ZhnURen/UHBDhVozIu zmnlEO8xlTJ7Oo8XYRKyA0AcZFKchOcJ5n0dLukWRma/fydZwkWFPqSON4Gph6l7 iINxzLhBwV9QzJqiJ2SoBK5TrpDuTrQ/S5s0lwtzF5bNAz7Unerdj18A00OcINso 7rov9USeKIxHNt2iNZB5QiUkwGqEOuv0D+COv0tBD/fghRYGCLD3kjz2ZlR3r+Ge 6JF/+veM68bUztLE80cjJQG0yTCG5FrkMg05bIZ45OZjIvAMDL/1UJXiANiJFYIv V9ePuXWfKJs//vU31fG44K27dB/IrFwepYVAbTSrPZnGCx9QlXiUpeW0TTBV6IKB AYzSl3t4FYpGFb52mWNlI639hI9GJ8LYnts4dO2U7jxRyQEnTjsF0NJolTyopVEl f2z3FRo3s7K5M8Qshm9mPkJp6wfo39EAQV3tNQnixvZl3lJGSsuK+y8OaAv1Dwvt iH1FWzxnDDKzqR1ZVjyIQlbUMiAzjIC1crGKUlm7Da7gF5x1BdWgyKB5i2+S3VyA r0x1Syi0VbNrW1JQfJRs98VDI96tZ/N8+r4lzeMCAwEAAaOCASIwggEeMB0GA1Ud DgQWBBQjEzbpKy4CdyO+MQ+9ncqhuBPmEjCBjwYDVR0jBIGHMIGEgBQjEzbpKy4C dyO+MQ+9ncqhuBPmEqFWpFQwUjELMAkGA1UEBhMCUEwxDzANBgNVBAcMBldhcnNh dzEYMBYGA1UECgwPKi5sb2NhbCBkb21haW5zMRgwFgYDVQQDDA8qLmxvY2FsIGRv bWFpbnOCFBDWbbgn906G+LOobgc3wvGQCZCxMAwGA1UdEwQFMAMBAf8wCwYDVR0P BAQDAgEGMFAGA1UdHgRJMEegEzAHggVsb2NhbDAIggYubG9jYWyhMDAKhwgAAAAA AAAAADAihyAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADANBgkqhkiG 9w0BAQsFAAOCAgEAqBaI/6wL7AiaNO0A3/fW6Vs2Pv26GZ5MHCJ7utatgUWMeko6 VeA7ox1mI06Gtio/uZeAkcHWH3Mv8OTel09jPok524GhUCXZPWmy6Fw6UTqjCMZE BJE3DK4alXDyAd/huHu35HeG+yc4JcSjrMeWmXPp70YsfrfAHMFyu/xpsvasYFKR OLPNHvoOXSv2dE94RtrvTYchMb1Hny0T1UEq/9zKhfEyY+gL/49d5lnNc8gFflsN oxwQrJR5+Za2UhCk5eXtjihsHEEx5ATcWYKPWZjpJ1rzfBqy7GKdu6ooB/yItabq Mu9WGSgRDU//TvGgfppU0SdSGjdAfwPaxQMlNXzhdADzCshn+vrn3Dbjm0i1VVL3 ud/0I70SVNqQyBcH6qfieSL6Wzusz8HNKtTo7cTiIfQ9syUwLK+HZSOOaNkBsMvh c5BFUo6KReiea3+WSN912ZrVhXutA5TMhRNCnk2CWHnfJcKn69s1YErN36/OBHyP +Tyddb5wue/z5BF3yDEVJGbN+NLApIFC9GdqoRMmU6TRyIsGjIuWVqHrnZxLLYhs dB7bz3Di356w9E2ICKEy6g9OQHKHuL4MAzy9k3/ATQ6L/6DJsU60xDYNueLSBXaA gQ367qh5CSOq2Gh18Lyo1dNKRqhekhj+PQIIZrx7k9UhJGa4EEmFLNnOZ60=

cert:

MIIEOTCCAiGgAwIBAgIUFh/RK2IbfX8WuyuicSyTbnys14owDQYJKoZIhvcNAQEL BQAwUjELMAkGA1UEBhMCUEwxDzANBgNVBAcMBldhcnNhdzEYMBYGA1UECgwPKi5s b2NhbCBkb21haW5zMRgwFgYDVQQDDA8qLmxvY2FsIGRvbWFpbnMwIBcNMjAwOTE1 MTEyMDEyWhgPMjEyMDA4MjIxMTIwMTJaMB8xCzAJBgNVBAYTAlBMMRAwDgYDVQQD DAcqLmxvY2FsMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuERKh7lH TqrCC395M7gSoNAoXrM2TQ7xmBShuoeypCQaPHnufD40+3CxVWOUznC4k+OchDni TUcRJq6Zck3uRC5cC7H7vP6ULiwk5lTWZwKwmW8BTt/Qu+FnXBG+PLUF24s0Cqv4 wUOubU+/DamdwoufmYGjNxreddcJu8oCMuwJKGv3WTGmCsYHWmebrKE/ayw/MlWi 5oB8XrxpeZlD+po4H0rv1s2f1m4nXbEGjq3Wxdwh2dbwEQEMUjGNc+lRGS3evBo8 SF6+Ot8Wzfa/NYGlUcA3jYVHl9gMG398pGikrmTecXh5w0VOKJ4qSMhgzMqIH5WR DfT6VSG6AwZDqQIDAQABozgwNjALBgNVHQ8EBAMCBeAwEwYDVR0lBAwwCgYIKwYB BQUHAwEwEgYDVR0RBAswCYIHKi5sb2NhbDANBgkqhkiG9w0BAQsFAAOCAgEAtClj BoRiitzzzr0H7hZGI4RWa17L9ou1cmwBC10fdrgOPON9Kwsh632t82/EGfHmRR3D KCVke12Qd7jTchGna03JU+0zuc+5WN5LuBc/1R0iYWVwHmYWQtkLuBaWEvOvsH4N 8Og37Gn0nI8UBCZd8V9MgIIhsAJ0pk8vNi0bv5TnZk5n+IZtpWTQZVZj3F/8tAN3 ZNwkec8RjLCKsXygwadKNxkuxMrecqIKrOsE+mxpHuxciEoQHIrlYmwS7fdUYdtk vzS7UrKopNj1uAMAd31XDeEs1aXsJDnF3mk3sdKyx7/Alv01GA9FCCQJpa+naOtP e6rxcoDk1ffGDUIKr1QJgVrKUco4jrwmYLMOSjEOwzDH1zcmMeOs97OP2qKZE9BI i3nPQno907odphdRz0NA3mGy70mz6pTnsYOPW/9QFL25A8dsD10OPSrGjmKkSyv0 rRnJCx5uYXuz5Yw2fO097n1z7jEGu9Ve27pvifG2pgT4PA1a3lWFDDlABo+cyDVB +OSvIWvr0YZpfQYam069AF2vtyqdw8FWHTlV9zH/6r3gXk9VrLBrzNWMCnUJwK7h Y8mnUwc9nVtWqwNxIS9oda4R7DImhEmNK3xz2lEpHIWVisd8p+TuTVHL2D22WzPX 76MD6hy8iNxOTr00+c+NcDzrqjH4FftkvEEg35g=

Firefox won't open my professor website: https://danielesirangelo.altervista.org/ and there's this error How can i fix this?

Hi all,

while playing (or better "fighting"...) with a linux docker container on Win10/WSL2/Ubuntu for using the MS spfx tool chain, I generated a SEC_ERROR_REUSED_ISSUER_AND_SERIAL in FF85.0/Win10 by first setting up a certificate exception for a dev-cert (https://localhost:4321) and then have the certificate re-created.

As described the support article [https://support.mozilla.org/en-US/kb/Certificate-contains-the-same-serial...], I removed all certificate exceptions for localhost:* and deleted the "gulp" authority in options/security/certificates.

Unfortunately, the SEC_ERROR_REUSED_ISSUER_AND_SERIAL persists even after a restart of firefox.

Any help is very much appreciated...

Thanks & greetings Markus Fehn

I hope someone can help me with this problem. I own the domain "cpaaffiliatesnetwork.com" and the site serves as my business site and access to my business network platform. The site is SSL secured and the SSL certificate was renewed in February 2021 for 1 year. Since the SSL renewal, I started having issues accessing the site from any browsers installed on this computer (Edge, Firefox & Chrome). I have now managed to fix the display issue in both Edge & Chrome through clearing cache / history, BUT, I have tried the same with FF with no success. I have also tried uninstalling and reinstalling Firefox, but, still receive the error below for any attempt to access the site: Secure Connection Failed

An error occurred during a connection to www.cpaaffiliatesnetwork.com. Peer’s Certificate has been revoked.

Error code: SEC_ERROR_REVOKED_CERTIFICATE

   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.

All external people i have asked to check the site have confirmed it works fine for them, but, it will not work for me. Hoping someone has a suggestion many thanks in advance :)

Hi!

So i have a problem with opeing sites : Google and Youtube. It happend randomly. All was working great i restarted computer and suddenly its not working;/ I scaned for viruses - download eset - nothing. When eset war running it started working again - i deleted eset since it was slowing down my pc, and the problem is back.

Error code: SEC_ERROR_UNKNOWN_ISSUER

Error info:

https://www.youtube.com/?gl=PL&hl=pl

Wystawca certyfikatu uczestnika komunikacji nie został rozpoznany.

HTTP Strict Transport Security: true

HTTP Public Key Pinning: true

Łańcuch certyfikatu:

MIIDdjCCAl6gAwIBAgIQKd8+XqA5qrZPzhYj71P8MzANBgkqhkiG9w0BAQsFADAj

MSEwHwYDVQQDDBhEaWdpQ2VydCBHbG9iYWwgUm9vdCBHMUEwHhcNMjAwNDA4MDcx

NjI2WhcNMzEwNDA4MDkxNjI2WjAaMRgwFgYDVQQDDA93d3cueW91dHViZS5jb20w

ggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDeIu9SWvCMhhDqkCCvRmDY

/8Z/EyxMySr5+CgqMmApxmNA5kKSDpjbCFGuRTkC/2SwLiaQCRuovVvwvZrk8Tlu

dxu6txaDQg9nldZVS19FO5bj5L/8FO7n82bLxm+omGDF+IVbZW+338fbfO/HcxS1

GEnammeE44nw8vYdpPrQx481gu9AGMLsQLUM/EwUQ4u4FHQPKE9z6iUtkebv0/h+

4GbhvdDegrCXyvJSXuzxzilgtB5R1inw5UvibVcStdpjL69+px39OKJvV05eqNfJ

xJtxjmx7HQgZcjdW/Xo1f4yYxyaT9toYxdPpH1atB58TlsMA66x/Z2kKK2gL+MiB

AgMBAAGjga4wgaswEwYDVR0lBAwwCgYIKwYBBQUHAwEwDAYDVR0TAQH/BAIwADAO

BgNVHQ8BAf8EBAMCBaAwNgYDVR0RBC8wLYIPd3d3LnlvdXR1YmUuY29tgg0qLnlv

dXR1YmUuY29tggt5b3V0dWJlLmNvbTAfBgNVHSMEGDAWgBSWti4vM+xzcoW7bzKo

dbvLnKtUdjAdBgNVHQ4EFgQU1lIhGk7z+LGh+Amnt433ZZmGSoAwDQYJKoZIhvcN

AQELBQADggEBAGAlYFFFqa/XToQ6idM+5F9a1l+IOHfp8og3pg1Z1GVbfrB14eRJ

ZulnLkJI0cxpSNgLo9m9sl6+JdL85gV0f/6PpxDgflfZBKJgPxFtDShemgRiY2jQ

Vl6b7/Rp8nR1r3kfdcc1mA0XQKnzt4RxjzFUqHycWbkiBVPBm+ZVD2btgb8gVluZ

ScGRF0GolVx84KoE1A2WkrxRgu/lprAV/8I6AZxnI8oSBc/SqRXjInbtt1jd0xMe

nOCYTjOld+52kl3/LTCmSmHtBau0JlRROAMchNl7xhGrwNer9uYuylFC85xa0GzA

7S6uZRV3pnqWHBq9BUvU+Tm/hLfGkHcZI/E=

Need help :)

Thanks

After auto update to FF 89.0, access to long-time Fidelity account is intermittently blocked as a security warning, or causes DSL line to drop at submission of account security code, or displays account entry page as plain text, not std HTML formatting, or most often results in a technical error page saying try again later. MS EDGE works fine, no issues. This is the only webpage this occurs on. Fidelity has no FF reported issues on their end nor does my IP supplier. Using desktop PC, running Win10/64-bit, DSL line @ ~ 2.3 Mbps. Using the "Light Theme" which was auto set with 89.0. This plus the new bastardized menus will push me to drop FF since I can't afford endless hours to fix basic functionality with ea update.

See attached: Getting “Secure Connection Failed” error Running Windows 10 Pro Build 19042 on a Laptop Access to the same secure website works fine with Chrome and Edge Also works with Firefox on my Desktop computer So something is weird with Firefox on the laptop? I tried uninstalling and re installing and removing all my user/appdata Thanks for any clues Email: ac.berkema@gmail.com

Re-secure, RecordSeek, free use, it is much need in family records for sources and new data, found is sister-partner family records. And don't remove it again, please. FamilySearch and ancestry.com https://familysearch.org/partneraccess

Hi, I've been having issues with Firefox for some time now. Every page I got to throws a NS_ERROR_NET_INADEQUATE_SECURITY error. I cannot fix it by setting network.http.spdy.enabled.http2 to false is because Firefox then starts crashing. In the past I've gone around the error by turning http2 off, but recently, first the developer edition, then after today's update to 91.0-0.1 of stable version Firefox crashes if I turn the feature off.

The developer Edition started throwing NS_ERROR_NET_INADEQUATE_SECURITY sometime in spring, then started crashing in June I think. The stable version followed soon as described above.

I am submitting this ticket from a beta version, which for some reason does not have this issue.

I thought it may be the Linux version of Eset, but removing it did not help. I cannot think of any other reason why am I getting those errors, but it seems I am alone because my colleagues don't seem to have this issue neither on macOS, nor Windows.

Edited to add TLDR: some Firefox requests to Google servers seem to fail internally. What can I try to diagnose the problem?

I'm having a recurring problem with Firefox on various Google sites: google.com, Gmail, Calendar, Keep etc. For long periods of time (but not always), Firefox completely fails to load the site, or loses its connection after the page is loaded (for example Gmail displays an error message "Oops... The system encountered a problem (#001)"). The problem usually seems to occur for periods of many minutes, with occasional gaps where the sites work properly. Also, it seems to be site-specific: sometimes it will load google.com normally while Gmail is still having problems. This is really frustrating, I'd like to use Firefox for all my browsing but I also need to use Google services regularly and that doesn't work if Firefox won't load them properly most of the time.

I'm pretty confident it's a problem with Firefox itself, and not with my network or computer, because I get the same issue across multiple Firefox installations and versions (Firefox 90 and 91 on Windows 10, and Firefox 78.10.0esr and 90 on Linux), and while the problem is happening I can access the same sites successfully from a different browser on the same computer (Chrome or Edge). I've tried refreshing my Firefox profile, working in a private browsing window and using a completely new profile, but the problem still occurs. I've also made sure I'm using "Standard" protection in Firefox's security settings and disabled Enhanced Tracking Protection for the sites I'm trying to access.

I've tried to look at what's going on using Firefox's Network Monitor, and the key thing that seems to happen when this problem occurs is that one or more network requests to a google address (google.com, mail.google.com or ssl.gstatic.com) appear with "0 B" in both the Transferred and Size columns (see screenshot attached). Sometimes the failed network request has a simple padlock icon as in the screenshot, and sometimes a red error symbol with mouseover text that says a security error prevented the resource being loaded. There's also occasionally an error message in the Console: "A ServiceWorker passed a promise to FetchEvent.respondWith() that rejected with 'TypeError: NetworkError when attempting to fetch resource.'.". Removing the relevant service workers in about:serviceworkers doesn't make any difference. On Linux, I've tried using tcpdump to check the actual network traffic and it looks like nothing is actually sent across the network for these requests, so whatever the problem is seems to be happening inside Firefox itself.

Ticking the "Disable Cache" box in the network monitor doesn't help. If I manually resend the same request using the menu in the network monitor, a normal response is received (but the content is not actually displayed in the browser).

It looks to me like some kind of caching or security problem, where Firefox somehow gets in a state where some network requests are blocked or fail to load from a cache, but after a while whatever is causing the problem is cleared and it works normally for a minute or two before the problem recurs. I would simply report this as a bug on Bugzilla, but I can't offer steps for anyone else to reproduce the problem because it only happens when I'm logged into my own Google account. I've run out of ideas for how to diagnose or fix this. Can someone suggest anything else I should try? Thanks!

Version: 91.0.1 Settings--> Privacy and Security -->View Certificates-->Your certificates--> pick target cert to delete-->click ok on confirmation window --> click ok on Certificate manager window.

Restart FF, Settings--> Privacy and Security -->View Certificates-->Your certificates, the deleted cert is on the list again.

The same happens on that under Authorities.

I got a new printer today. Epson WorkForce Pro 3820. When I access the web interface, I get this error. I can proceed past it but I'd like to know how to get rid of the error. Thank you. Barbara

Warning: Potential Security Risk Ahead

Firefox detected a potential security threat and did not continue to 192.168.xxx.xx. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details.

Learn more…

192.168.xxx.xx uses an invalid security certificate.

The certificate is not trusted because it is self-signed.

Error code: MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT

View Certificate

As of today, Firefox can no longer connect anywhere. I had to use Chrome to post this bug report.

No matter where I try to connect, it fails with the following error:

Secure Connection Failed

An error occurred during a connection to gmail.com. security library: received bad data.

Error code: SEC_ERROR_BAD_DATA

Today is the day I cannot use Firefox anymore. It keeps on blocking webservers in my local network because of a self-signed certificate.

It is a shame, I have been a loyal Firefox user since Netscape. Today marks the beginning of the end of this journey. A pitty.

So, Chrome it is from now on.

-(