![Every page results in "SEC_ERROR_UNKNOWN_ISSUER", can't view any page. | Firefox Support Forum | Mozilla Support Every page results in "SEC_ERROR_UNKNOWN_ISSUER", can't view any page. | Firefox Support Forum | Mozilla Support](https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2017-12-12-18-37-05-c2f22e.png)
Every page results in "SEC_ERROR_UNKNOWN_ISSUER", can't view any page. | Firefox Support Forum | Mozilla Support
![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
![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)