![having the SEC_ERROR_UNKNOWN_ISSUER problem, on all sites. Chrome too, but microsoft Edge works. Just started after latest windows 10 update this morning | Firefox Support Forum | Mozilla Support having the SEC_ERROR_UNKNOWN_ISSUER problem, on all sites. Chrome too, but microsoft Edge works. Just started after latest windows 10 update this morning | Firefox Support Forum | Mozilla Support](https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2018-05-18-00-41-14-51c7a1.png)
having the SEC_ERROR_UNKNOWN_ISSUER problem, on all sites. Chrome too, but microsoft Edge works. Just started after latest windows 10 update this morning | Firefox Support Forum | Mozilla Support
![How To Fix Your Connection Is Not Secure Mozilla Firefox | Sec_Error_Unknown_Issuer Easily - YouTube How To Fix Your Connection Is Not Secure Mozilla Firefox | Sec_Error_Unknown_Issuer Easily - YouTube](https://i.ytimg.com/vi/OPqom2ySjSw/hqdefault.jpg)
How To Fix Your Connection Is Not Secure Mozilla Firefox | Sec_Error_Unknown_Issuer Easily - YouTube
![from past week or so I am getting this "Did Not Connect: Potential Security Issue" on well known sites | Firefox-Hilfeforum | Mozilla-Hilfe from past week or so I am getting this "Did Not Connect: Potential Security Issue" on well known sites | Firefox-Hilfeforum | Mozilla-Hilfe](https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2020-06-02-03-50-01-f8c4f2.png)
from past week or so I am getting this "Did Not Connect: Potential Security Issue" on well known sites | Firefox-Hilfeforum | Mozilla-Hilfe
![How to Fix Firefox SEC_ERROR_UNKNOWN_ISSUER Easily | Antivirus program, Best home automation, Home automation system How to Fix Firefox SEC_ERROR_UNKNOWN_ISSUER Easily | Antivirus program, Best home automation, Home automation system](https://i.pinimg.com/736x/07/c3/aa/07c3aa8b674254ce4f4db2ede67782da.jpg)
How to Fix Firefox SEC_ERROR_UNKNOWN_ISSUER Easily | Antivirus program, Best home automation, Home automation system
![This Connection is Untrusted (sec_error_unknown_issuer) Error on Windows 7 and nothing can fix it! | Firefox Support Forum | Mozilla Support This Connection is Untrusted (sec_error_unknown_issuer) Error on Windows 7 and nothing can fix it! | Firefox Support Forum | Mozilla Support](https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2016-01-05-18-47-52-dbeb1c.png)