Quote:Mozilla stopped the distribution of Firefox 65 for Windows through the organization's automatic update system after reports of antivirus incompatibilities emerged.

The organization released Firefox 65.0 for all supported operating systems a few days ago on January 29, 2019.

Firefox 65.0 introduced new and improved features like tracking protection enhancements, interface language improvements, and support for the AV1 and WebP formats.

Bug 1523701 was filed three days ago on Mozilla's bug tracking website. The user reported that it was no longer possible to connect to websites using Firefox after the upgrade to the new version of the browser.

Firefox would display the error SEC_ERROR_UNKNOWN_ISSUER and that happened using different profiles and different computer systems.

Quote:Every website I try to visit no matter what website it is always gives "Your connection is not secure" "SEC_ERROR_UNKNOWN_ISSUER"
This happens on three different profiles and two different computers.

It became clear quickly that some antivirus solutions on Windows, Avast and AVG were named explicitly, caused the issue in Firefox 65.0.

Full reading: https://www.ghacks.net/2019/02/01/mozilla-halts-firefox-65-distribution-on-windows/