Firefox Support Forum

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.

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.

Dear Mozilla Community,

I have problems with one website. This website is poczta.wp.pl. Sometimes this can't be loaded. I see this error:

"SSL_ERROR_INTERNAL_ERROR_ALERT".

This is website with https protocol. What is the reason? Other websites works fine. I think that this is not problem with my router or internet provider because I changed both and it is still problem there. I had this problem also on another computer with Windows 10 operating system. I contacted with administrator of this website and they think that all is okay so they suggested me that this can be problem with browser or my computer.

This behavior is very hard to test because this issue is showed very rare. Sometime one time in one week and sometimes two time in one day. I don't know what is going on with this.

Can you help?

I need to download a certificate from a device in my networt called secunet Konnektor

https://www.secunet.com/loesungen/einboxkonnektor

on the manual it's written how to do it.

https://www.secunet.com/loesungen/einboxkonnektor#c1607

I suggest to find a manual somewhere in the first link or in google:

chapter 7.4.3

go to chrome (same with edge)

click on the lock on the left hand side of the link https://XXX.XXX.XXX.XXX:8500/management

somehow click on the button where you can open a small windows called "certificate".

The "General" tab shows informations about the certificate.

Click on the tab "Details" and click on "Copy file".

The certificate-assitent opens and after clicking on next, you choose DER-coded-binary X.509 (.CER)

Save the file somewhere where you can find it.

I can't do this on firefox

On firefox I can find a lock on the left hand side of the link https://XXX.XXX.XXX.XXX:8500/management

when i click on it and then on something else, i can then click on more informations.

a windows opens called "page informations"

under "security" i click on "view certificates" and a new tabs opens called "certificate for konnektor".

but there is no possibilty to download a cer-file. only a pem file and it doesn't really help me.

An error occurred during a connection to www.airguns.net. Cannot communicate securely with peer: no common encryption algorithm(s).

Error code: SSL_ERROR_NO_CYPHER_OVERLAP what in the hell do i do?????????

I have recently upgraded to windows 11. After this upgrade, I am facing connection issue in the firefox. Generally, I keep open my Office Gmail Account till my office hours around 8 hrs daily. After the opening the mail it runs as usual, but after ten to fifteen minutes it shows connection error. It continues showing the same error for the whole day. While I tried this things with the other websites, it shows same error for other websites also. The same thing I have tried in Google Chrome browser, there is no such kind of errors or difficulties are found. Kindly guide me further or please update the same.

In the past it was possible.

How can I download a certificate from a web site?

I click in the Lock Icon in the url bar->...->..> View Certificate

It only shows a partial view of the certificate and there isn't a button for download the certificate.

Firefox giving following error,

Websites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for 192.168.1.100. The certificate is only valid for the following names: anishamsi.lan:6659, 192.168.1.100:6659, 192.168.1.100, anishamsi.lan

I can see the url is there as listed by firefox error itself (verify with screenshot 1), the url is "https://192.168.1.100/api/validateLogin"

please see the screenshot as well. First screenshot is for the error, second is for the certificate returned by the website and as shown by firefox.

What is the error, i have created the certificate correctly. i am sure this is a bug in firefox?? If not!!! how u suggest i fix this i have added following alt names inside my csr. DNS.1 =anishamsi.lan:6659 DNS.2 =192.168.1.100:6659 DNS.3 =192.168.1.100 I have already uploaded the certificate at names screenshot.

Friends,

I'm really, really hoping someone here can help me:

I've been trying to load my website: www.photostills.com using the latest Firefox Browser V. 94.0.2. but continue to recveive the following message: (see below)

I have tried resetting my preferences to allow access. I can open my site in other browsers without a problem but really need to have clients access it from Firefox as well.

Please, please advise.

Thank you for your help!! Here is the error message:

Secure Connection Failed

An error occurred during a connection to www.photostills.com. Cannot communicate securely with peer: no common encryption algorithm(s).

Error code: SSL_ERROR_NO_CYPHER_OVERLAP

   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.

when trying to access my website Noblittoilandgas.com I get a SECURE CONNECTION FAILED notice, Error Code: SEC_ERROR_REVOKED_CERTIFICATE, how do I fix this issue?

Have been trying to fix this problem - FF works beautifully if Kaspersky Internet Security is OFF but cannot access any websites when it is ON - just this PR_CONNECT_RESET_ERROR page.

Kaspersky support has been assisting but no solutions as yet. Any help from Mozilla is appreciated. This has been going on for 4 days now.

Using FF version 94.0.2 (64-bit) on Windows 10.

I've tried debugging the extension, errors in attachment

Why does this url fail? This is not the first url I have had that failed using Firefox but works on Edge and IE. Most that fail seams to be political. Is there any censuring being done on Firefox? Thank You Jack

http://email.mg.politicalanimalnews.com/c/eJx1UkuypCAQPE330uAnyqIX0zPx7gEIgoKAooCnH-cAE1EZWYvKXGTW9NG0p4y_7QcBBCEC9CGAUQe73-D7_WEMf9Gvgf582YsAP3cxOJut5I5v1nO3qXJ0Mvi3-UhAtOBgZJARhYiGnExcEQAA65Hoydt_CBgpGJ7VfUzO8YV_vdDPM3nncv2f9b8T_FOze-E_YkQjGd1y5orterfdlDRrMV7moBtbFoZaBrYnakyjvdKFdreJlCM9fAtLna661SKjkHp8QMLG-zCBW0mDoGGz3IHvT7frQTbeIgiTRGuRwaYSV3ZTmnOP8LKFxvIcms_nkNaIWEuIU4bBENmIZzIvlyl8OkIwx-odr5OqdBnykgW51aUppVwT4fXc1iNPJEonGyPcGbExiMuJTlOwI246bK2Xq9aWoGCGloKQyBHYkx6CNuSdUgEjQHt_7lVqeDfDcemXEj3WVhAI9K2ESmj3mfpbX2dcNzmTG07W3OMjYfeQU9NAOT7qeMYWQ1uTSn6UJceRmJYISlGz_EJUWfOU4IIfp2XRe3SKE-QW5j2WpR4eoQU5994_i7DCqedjhHLuCGc23abyO39qt-OAAuhgqrLbOIGmdBsTg4-dYWdZro4S3kjXKyR4d1X8F9fS6B0

I recently updated the SSL certificate for my business. My Firefox browser indicates the certificate is "not secure." When I navigate to my website using Bing, the SSL certificate shows as being "secure." I'd like the SSL certificate to indicate it is secure using Firefox browsers. Is there something I can do so that when someone lands on my website using Firefox it will correctly show that it is a "secure" site?

Thank you.

G. Borovick

Hi, We currently connect to a vendor devices admin page that is inaccessible via Firefox because of the following error "Secure Connection Failed" (Error code: SEC_ERROR_INADEQUATE_KEY_USAGE) and won't present the option to proceed via the "Advanced" option. Long story.... The vendor is aware of the issue and as the configuration page is always accessed internally and uses TLS in some form they do not want to allow us to make any changes to uploading our own certs.

Anyway recently I was made aware of a keyboard shortcut to force firefox to bypass the error screen and force a connection, however I have not been able to find it since on the Shortcut guide for firefox. Can anyone provide me with this shortcut, It will save having to switch between multiple browsers.

Thanks is Advance,

Greetings. I can't open most sites I usually visit (even google.com) via my Firefox 98.0a1. This happens since today. All error codes are SEC_ERROR_LIBRARY_FAILURE.

Tried to:

• Disable DNS-over-HTTPS.
• Disable HTTP/3.
• Disable proxy (never had it enabled anyway).
• Disable sending info to Firefox developers.
• Change settings of DNS-over-HTTPS.
• Restart the browser (after each action).

Nothing helps me... But I still can visit some websites, but most common resources are not working for me. Please help me because I can't use Microsoft Edge without getting mentally ill. :/

i have ff latest version on windows 10 96.0.1 64b I have seen another entry in support about the same topic, but does not solve my problem when i logon to federal service with eid card they use a certificate when I changed my eid a new certificate was downloaded, and old is also available but when trying to login with new eid, error in edge i tried and there I get a prompt with certificates that exist and which to use : select new and ok I want to delete in ff this old certificate setting- security-certificates deleted the entries for citizen ca - close browser -open - they are still there I renamed also cert9.db cert8.db as in other entry : still there how to remove permanently these certificates to be able to login with eid or how to select which certificate to use thanks for all help best regards, Guy

Hi,

Firefox is displaying this message: Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to l.mail.people.com because this website requires a secure connection

and does NOT let me continue... HOWEVER, if I copy n paste the URL (https://l.mail.people.com/rts/go2.aspx?h=16465956&tp=i-1NHD-9U-36Hb-1OjSfX9-Hv-5EjIU-1c-Xmrj-1OjOLzQ-l78hyiHVom-1J3ttn&x=6b160f0f640ceeb5fd6f8fe1a3284d4886844914%7c739139%7c20220211%7c021122%7c739139%7c79459191515) to a DIFFERENT browser, there are NO issues with it.

Why is Firefox complaining and how do I tell it to STOP?

Secure Connection Failed

An error occurred during a connection to 61.5.135.10:89. Peer using unsupported version of security protocol.

Error code: SSL_ERROR_UNSUPPORTED_VERSION

   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.

This website might not support the TLS 1.2 protocol, which is the minimum version supported by Firefox.

I am repeatedly getting the SECURE CONNECTION FAILED error only for Google-related sites like Youtube, Gmail and Google search. I've to then close Firefox and immediately open it again to see those sites again.

This is the Error: Secure Connection Failed An error occurred during a connection to www.google.com. SSL peer was not expecting a handshake message it received. Error code: SSL_ERROR_HANDSHAKE_UNEXPECTED_ALERT

&

"Secure Connection Failed An error occurred during a connection to www.youtube.com. PR_CONNECT_ABORTED_ERROR"

FYKI, the problem started occurring in November, 2021. It had never happened before. I repeat, this error is occuring only for Google-related sites, not for others.

What could be the problem? Please help!

I am getting a Secure Connection Failed error on every website I try to log into on my laptop. The issue is not occurring on my desktop or either of my iOS devices under the same login account. I have tried every "fix" I can find through the FAQ's and through online googling, nothing has worked. I don't have any conflicting apps or security features that I can find. I have tried purging the history/cookies, un-installing and re-installing. After a re-install the websites will work for about 5 minutes then I receive the same Error message. Please help!