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Report errors like this to help Mozilla identify and block malicious sites I get this when I try to download a new version since I keep getting the message that firefox is unable to update my account and I click the download link
Chosen solution
How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.cdn.mozilla.net/media/uploads/images/thumbnails/2017-06-07-08-34-22-cb6da3.png
https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER
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Try this:
- download the Firefox installer and save the file to the desktop
*https://www.mozilla.org/en-US/firefox/all/ - start the installation with a double-click on the desktop icon
The link for the download gets the same message; www.mozilla.org uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER
I get the same message at most sites I try to go to now.
Chosen Solution
How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.cdn.mozilla.net/media/uploads/images/thumbnails/2017-06-07-08-34-22-cb6da3.png
https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER