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Mozilla Firefox does not work when disabling the encryption key TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)

Dear Mozilla team, We are a company that develops web systems. The customer’s security service asks us to close all old encryption keys on the server in order to avoid sy… (read more)

Dear Mozilla team,

We are a company that develops web systems. The customer’s security service asks us to close all old encryption keys on the server in order to avoid system vulnerabilities and use only new keys. We disabled most of the old keys and the system works fine on all browsers. As soon as we turn off the encryption key TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014), then all web systems stop working through the Mozilla Firefox browser. (At the same time, everything works correctly on other browsers). The Mozilla Firefox Documentation says that this browser supports new encryption keys and can work without old encryption keys. Link (https://wiki.mozilla.org/Security/Server_Side_TLS). Also on our server are included all the necessary encryption keys for Mozilla Firefox to work.

Do you have any ideas on how to solve this?

Asked by yulyan.karpiy 4 months ago

Last reply by dkeeler 4 months ago

An error occurred during a connection to my website. Peer’s Certificate has been revoked. Error code: SEC_ERROR_REVOKED_CERTIFICATE

While visiting my website , i receive the error : An error occurred during a connection to my website. Peer’s Certificate has been revoked. Error code: SEC_ERROR_REVOKED… (read more)

While visiting my website , i receive the error : An error occurred during a connection to my website. Peer’s Certificate has been revoked.

Error code: SEC_ERROR_REVOKED_CERTIFICATE

Also while sending emails from mozilla thunderbird i receive the same error. I am able to send emails and access my website from Google chrome browser, Outlook email client and also from my phone.

Kindly look into to this and provide a solution

Asked by it_sts 4 months ago

Last reply by jscher2000 4 months ago

How to fix Access Denied to http://support.microsoft.com

After the January update Mozilla Firefox reloads to many Microsoft websites delayed Access Denied. https://support.microsoft.com/en-us/help/13853/windows-lifecycle-fact-s… (read more)

After the January update Mozilla Firefox reloads to many Microsoft websites delayed Access Denied.

https://support.microsoft.com/en-us/help/13853/windows-lifecycle-fact-sheet Access Denied You don't have permission to access "http://support.microsoft.com/en-us/help/13853/windows-lifecycle-fact-sheet" on this server.

Reference #18.2d15e8ac.1580920353.2dd4db75


https://support.microsoft.com/ Access Denied You don't have permission to access "http://support.microsoft.com/" on this server.

Reference #18.615e8ac.1580920716.53b779b2


https://support.microsoft.com/en-us/...-update-errors Access Denied You don't have permission to access "http://support.microsoft.com/en-us/help/10164/fix-windows-update-errors" on this server.

Reference #18.5d472317.1580069149.1b9f5e94

https://support.microsoft.com/en-us/...update-history Access Denied You don't have permission to access "http://support.microsoft.com/en-us/help/4529964/windows-10-update-history" on this server.

Reference #18.66472317.1580069133.9cd4a82b

https://support.microsoft.com/en-us/...cle-fact-sheet Access Denied You don't have permission to access "http://support.microsoft.com/en-gb/help/20443/windows-10-battery-saving-tips" on this server.

Reference #18.5d472317.1579991513.16dd70d8

https://support.microsoft.com/en-us/...l-numbers-when Access Denied You don't have permission to access "http://support.microsoft.com/en-us/help/937251/disk-drive-numbers-may-not-correspond-to-the-sata-channel-numbers-when" on this server.

Reference #18.5d472317.1580051243.19dacd87



There are several hundred browser websites that are opened after reboot with Mozilla Firefox reload.

How did this happen with a reload?

Is this a cache or cookie problem?

What was changed in the January Mozilla Firefox update?

Ccleaner requires that the browser is closed to clear cache and cookies.

If this were done the several hundred webpages would no longer reopen.

How can the Mozilla Firefox browser be modified so that it no longer displays Access Denied without losing the reload option for the hundreds of websites that are currently open?

(The browser typically has the default settings)


The Google Chrome and Internet Explorer browsers can open these websites without problems. Other end users opening the same websites with Mozilla Firefox did not see Access Denied.


For this problem please indicate:

What specifically happened with the January update that may have caused this problem? If it was not the January update what else could have caused this problem? How can the problem be fixed so that the webpages that are currently open can easily be reopened after a reboot with reload? What could have been done to prevent this Access denied problem?

Asked by ineedhelpwithfirefox 5 months ago

Last reply by jscher2000 5 months ago

Potential Security Issues on every single page

I'm getting "Error code: SEC_ERROR_CA_CERT_INVALID" on every page. (Full details in screenshot) I've tried accessing google and reddit, which I had been browsing no probl… (read more)

I'm getting "Error code: SEC_ERROR_CA_CERT_INVALID" on every page. (Full details in screenshot)

I've tried accessing google and reddit, which I had been browsing no problem, but no luck. I can't even access Mozilla help. And I haven't been able to bypass anything.

I've been googling this (on Chrome! yuck!), with no luck. If I stumbled upon the answer, I wasn't tech savvy enough to recognize or implement it.

Could someone give me a hand?

Asked by jdoerflinger2 5 months ago

Last reply by philipp 5 months ago

  • Archived

Firefox error

On my PC when trying to connect several sites I receive a message that the response telling me that the authenticity of the data received couldn't be verified this only h… (read more)

On my PC when trying to connect several sites I receive a message that the response telling me that the authenticity of the data received couldn't be verified this only happens on my PC I'm running Windows 7 pro can connect on my Android phone

Asked by chalmersi 6 months ago

Last reply by FredMcD 6 months ago

  • Archived

We have a Sectigo Limited Signed Certificate for one of our websites, but the Certificate is not trusted on new browsers.

As per the above, the Certificate is valid an is trusted on other browsers, but is displaying a warning with Firefox users. Please let me know should you require more inf… (read more)

As per the above, the Certificate is valid an is trusted on other browsers, but is displaying a warning with Firefox users.

Please let me know should you require more information.

Asked by graeme.young 7 months ago

Last reply by philipp 7 months ago

  • Archived

PR_CONNECT_RESET_ERROR for google, facebook, youtube...

Hi everyone, on my Dell laptop I suddenly started getting a PR_CONNECT_RESET_ERROR a few days ago when trying to access websites like google, facebook, youtube etc. Other… (read more)

Hi everyone,

on my Dell laptop I suddenly started getting a PR_CONNECT_RESET_ERROR a few days ago when trying to access websites like google, facebook, youtube etc.

Other websites like ebay, amazon or tripadvisor work. The problem also occurs with Chrome and IE.

I have checked date and time, run all troubleshooting programs, restarted router and laptop, cleared cache and cookies and deactivated the windows defender firewall. I have no other security software installed.

Now I am all out of ideas. Can anyone help?

Thanks Kim

Asked by a2723816 10 months ago

Last reply by McCoy 10 months ago

  • Archived

Certificate can't be installed

I'm trying to add my own certifcate so i can get SSL's with MAMP Pro working. I get this error message "This personal certificate can't be installed because you do not o… (read more)

I'm trying to add my own certifcate so i can get SSL's with MAMP Pro working.

I get this error message "This personal certificate can't be installed because you do not own the corresponding private key which was created when the certificate was requested."

The key was created by MAMP.

Thanks

Asked by johneemac 10 months ago

Last reply by Meskó Balázs 10 months ago

  • Archived

How do I get around "Warning: Potential Security Risk Ahead" errors when I KNOW the website is safe?

How do I get around the error message, "Warning: Potential Security Risk Ahead" when I know the website is safe? I need to access it for school. The advanced option is no… (read more)

How do I get around the error message, "Warning: Potential Security Risk Ahead" when I know the website is safe? I need to access it for school. The advanced option is not allowing me to proceed. Please help!

Asked by Spider 1 year ago

Last reply by RobEh 10 months ago

  • Archived

I want to proceed to a trusted website after I recieve an SSL_ERROR_HANDSHAKE_FAILURE_ALERT

I am unable to find a way to proceed to a trusted site after receiving an "SSL_ERROR_HANDSHAKE_FAILURE_ALERT". The site I am going to is trusted and uses a trusted CA cer… (read more)

I am unable to find a way to proceed to a trusted site after receiving an "SSL_ERROR_HANDSHAKE_FAILURE_ALERT".

The site I am going to is trusted and uses a trusted CA certificate.

Asked by rtkoch1 1 year ago

Last reply by cor-el 1 year ago

  • Archived

Websites blocked; security connection failed message is SEC_ERROR_BAD_SIGNATURE, therefore need a quick solution or discontinue using Firefox

More and more of my favorite websites are blocked, so increasingly having to use MS Edge as a default browser. It is very frustrating so a solution would be most welcome.… (read more)

More and more of my favorite websites are blocked, so increasingly having to use MS Edge as a default browser. It is very frustrating so a solution would be most welcome. I can't even use this Mozilla help website so have had to use MS Edge to convey this message.

Asked by DonJScott 1 year ago

Last reply by FredMcD 1 year ago

  • Archived

will not allow me to log in to my e-mail tried to log on here sent password to my e-mail

tried to lo log into my e-mail and received this message [Your connection is not secure The owner of xfinityconnect.email.comcast.net has configured their website imprope… (read more)

tried to lo log into my e-mail and received this message [Your connection is not secure

The owner of xfinityconnect.email.comcast.net has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.]

Asked by Darhith 1 year ago

Last reply by FredMcD 1 year ago

  • Archived

When trying to access Airbnb I get: The owner of www.airbnb.com has configured their website improperly. This site uses HTTP Strict Transport Security (HSTS)

When I try to access the AirBnB site from my Mac laptop, I get the response below. No problem accessing other sites, and AirBnb says they cannot help me. I'm not very … (read more)

When I try to access the AirBnB site from my Mac laptop, I get the response below. No problem accessing other sites, and AirBnb says they cannot help me.

I'm not very tech savvy, so I'd appreciate any advice to be step by step. Much appreciated!


Your connection is not secure

The owner of www.airbnb.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.

Asked by lpthiele 1 year ago

Last reply by VerizonSucks 1 year ago

  • Archived

Certificate error while accessing a site

Hi, We are having certificate issues while accessing url https://rmsstage.resolvecloudbase.co.nz We verified that the certificates used by this url are valid and the same… (read more)

Hi, We are having certificate issues while accessing url https://rmsstage.resolvecloudbase.co.nz We verified that the certificates used by this url are valid and the same certificates are being used by https://rmsstaging.resolvecloudbase.co.nz and this site can be accessed without any issues.

One more thing: After accessing https://rmsstaging.resolvecloudbase.co.nz , when we access https://rmsstaging.resolvecloudbase.co.nz then there are no issues reported until we delete file cert9.db from the Profile Folder. Can you please advise what could be the issue. Thanks Praveen

Asked by praveenshukla10 1 year ago

Last reply by jscher2000 1 year ago

  • Archived

Error Websocket and SSL certificate on custom port. "SEC_ERROR_UNKNOWN_ISSUER".

I have developed a websocket app, it have SSL encryption and run behind a custom port. Firefox block the connection tought certificate is verified by ESET, and show me SE… (read more)

I have developed a websocket app, it have SSL encryption and run behind a custom port. Firefox block the connection tought certificate is verified by ESET, and show me SEC_ERROR_UNKNOWN_ISSUER error. I have no problem on port 443. Can u help me ?

Asked by AndreaIta 1 year ago

Last reply by jscher2000 1 year ago