Firefox-Hilfeforum

A couple users at our site intermittently receive a SSL_ERROR_BAD_MAC_ALERT error when navigating to Google in Firefox. This happens in Version 99.0.1 (64-bit) on Windows 10 computers. When the issue occurs, users can navigate to other websites without issues. Navigating to Google in a different browser works no problem. Restarting the browser will resolve the issue. Clearing cookies and site data has no effect. Users can also refresh the page after some time and the issue will go away.

Any idea as to why this is happening?

Reviewed "Sheribee" earlier issue which apparently involved a VPN. I do not have a VPN but have tried several times in the past week to access IRS refund status site without success. I can get into irs.gov, but am unsuccessful in accessing the refund status site after entering required input data. The issue has occurred only this past week.

I'm unaware of IRS issues causing this problem.

Have not had this issue on any other sites; and I have successful retrieved data in prior years.

I am not saving any sign on protocols with the irs or any other sites.

Running Windows 10. Thanks for any help. BTW I did get refund information using the telephone, but I want to ensure there's not a hidden conflict of some sort with FireFox. Thanks for any help.

I am getting a certification issue when trying to visit 2 specific sites which are some of the most visited sites in the web: https://www.google.com and https://www.youtube.com

The error it shows when trying to visit these 2 pages, is SEC_ERROR_UNKNOWN_ISSUER.

I have tried to troubleshoot it and follow the solutions recommended at: https://support.mozilla.org/en-US/kb/error-codes-secure-websites#w_the-error-occurs-on-multiple-secure-sites

however none of the solutions described in this guide worked to solve my problem.

In that guide, one of the suggested solutions is to scan my system for any malware. I used the following: Windows Defender Maleware Bytes AntiMalware Karpersky TDSSkiller however the results are all clean.

In the guide, it suggested that I check the clock as well. The system clock however is synchronized.

Last, I have resetted Firefox Profile but this didnt fix the issue either.

I shall note that the issue appeared yesterday and so far nothing helped fixing it. Not even the system restarts.

The issue about visiting these two sites, is limited only to Firefox.

I can access https://www.google.com and https://www.youtube.com without problems using Google Chrome and the Opera Browser.

Also, Google Mail and Google Translate work fine on Firefox. These two sites can be accessed with Firefox without causing any SEC_ERROR_UNKNOWN_ISSUER errors.

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 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

I'm on firefox 90.0.1 on Mac OSX Big Sur 11.2.3. When I try to delete a site certificate that I have (that is about to expire), it appears deleted, but when I open the certificates page again it reappears. When I restart Firefox after deletion it reappears. When I delete cert9.db from my default profile after closing firefox, and then reopen, it still reappears. When I uninstall Firefox, delete the default profile folder from App Data and the Mozilla and Firefox folders from my caches, it still reappears (I also deleted the update folder).

I am doing sync between this mac, my phone, and another computer, but I ONLY have bookmarks, Add-ons, and history. Might the sync be also syncing my certificates?

Help/tips would be appreciated.

Hi,

When trying to open www.facebook.com got a "SSL_ERROR_DC_EXPIRED", however, facebook's site works just fine in Chromium. Firefox is up to date, version is 89.0.2. This also happens in Firefox Beta as well, which is up to date too. OS: Debian Bullseye/Testing. DE: KDE Plasma 5.21.5

Hi all,

I'm having a repeat of this issue: https://support.mozilla.org/en-US/questions/1291551

Again some links from emails have been giving me the "Warning: Potential Security Risk Ahead" page with the error message "SSL_ERROR_BAD_CERT_DOMAIN". I get this in safe mode but not in private browsing. I have tried all of the fixes suggested last time I asked about this problem including deleting cert9.db but that hasn't worked this time (so maybe it wasn't the fix last time either).

To be explicit, I've tried all fixes on these pages so please don't suggest them again without providing an explanation about why you think it will work (a technical explanation please): https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message http://kb.mozillazine.org/Error_loading_websites https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors

And also this one, which is actually related to the message (none of the above are): https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean#w_ssl-error-bad-cert-domain

Some examples of links that I get this message for: https://click.mail10.smallworldlabs.net/ls/click?upn=4FIN3hZFvI-2BP9iq5nue2vk-2BIMF5sm7TLqXM-2BBHmHs4tQjfdaurWm34ztLj9SPiVE4gseyCl-2FaqSWT59ygV9BpAcDzFkriqc5NC2qBiwl5aOaxL8F5mgo-2BFX-2Fgbi7iwZeFhIlJVBY5pUPWQy6owSYMskwXWDY7Y1aaoMS-2BkHbmCPTNSg29Z4JoYD7fjx9bZW5b2-2Fg5dX2SSuZS5csOf3H6IGmB8UNGulRns8j4EzznpinCvgJxocujRrlszMnMzDFaGlZcc-2BWOcJNASuRsaEH6HcXAoqMnLhDAoAdn0UChLWOY-2FfbP2Ib-2FUEDr6NloUbD-2FnHqHVVYd821nihjMp740-2F5x7GMXZmwRiFR7H2o2PqTC4rmR-2BSqxJ-2BuAl15SvxjWYbO9ClP8PSHw5pY80IikJqK10tVO8wFNKUY0vnffi80-3DW8m3_a4b-2FpboTDHPk-2BrdoYKQMvkNzRfSbL-2BRxE8OVpRrBC237mTF3qcpluLuTnfAWEU7fFwhhtOg-2BbDd1pxD5bmCpb3y8948sPEH5oTF-2Fsg1k82R-2Be5SnCvGNogmdD1MB5K11JV0Ow8rxc63etMs7M6GZzfslGWbxLHW9hydaH2RME5RPXqcBAsIRau-2FizQsq15rW5BclijLm23gWXw-2BvlJjO8gxiJ-2BQwpw2wvKihYGT4DKxPTObnz-2Fpn1ua2ng0ah-2BN1xDub-2Bav5GSEDaq4OPiG8JUArfSPtya-2ByoEn6CzLpZaqsLJ5rbTCztuAV25pOmNhojUORS-2Fnyv8FFlz-2Fh4EX6xolAvA1UgOdaXT3xescKfmROnAvFsYyB88QxIKBXi1-2Br

Web sites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for click.mail10.smallworldlabs.net. The certificate is only valid for the following names: *.sendgrid.net, sendgrid.net

Error code: SSL_ERROR_BAD_CERT_DOMAIN

https://click.topgear.bbc.com/?qs=c719f0befb99016fe4d64e88dc7ec435f7eee7452916295aaa562fc47d530c91af5900c5d298ac67019e3560abca9b8eab0be3a91e8e632f

Firefox does not trust this site because it uses a certificate that is not valid for click.topgear.bbc.com. The certificate is only valid for origin-click.s6.exacttarget.com.

Error code: SSL_ERROR_BAD_CERT_DOMAIN

Please tell me if you need more info. All helpful suggestions much appreciated.

Thanks :)

When I go to login to my credit union, I get this message: "Websites prove their identity via certificates, which are valid for a set time period. The certificate for www.nmefcu.org expired on 3/25/2021.

Error code: SEC_ERROR_EXPIRED_CERTIFICATE"

I called my credit union and they told me they don't support Firefox and if I want to login I would have to use Edge or Chrome. Is there a fix for Firefox or am I being forced to use a different browser by my credit union?

I have been trying to get on the Malwarebytes website, but I keep getting;

Your connection is not secure

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

links.malwarebytes.com uses an invalid security certificate. The certificate is only valid for the following names: *.fortinet.com, fortinet.com Error code: SSL_ERROR_BAD_CERT_DOMAIN

This happens with all of my web browsers. Is it safe to allow Fortinet ?

Just updated Firefox from version 90.0.2 -> 91.0.1 on a Mac running OS 10.15.7.

I'm experiencing 404 errors of which do not occur in the previous version. Here's what the console shows...

Source map error: Error: request failed with status 404 Resource URL: https://MyWebsite.com/assets/vendor/bootstrap/css/bootstrap.min.css Source Map URL: bootstrap.min.css.map

I tried several things to try and isolate this issue, but all to no avail. The file does exist, and loads in the previous version of Firefox.

Any help would be greatly appreciate.