This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Wo archive tread sia. Meɖekuku bia biabia yeye ne ehia kpeɖeŋu.

Did Not Connect: Potential Security Issue

  • 3 ŋuɖoɖowo
  • 1 masɔmasɔ sia le esi
  • 2 views
  • Nuɖoɖo mlɔetɔ FredMcD

Rajesh Kumar Sahu
Rajesh Kumar Sahu
more options

Someone could be trying to impersonate the site and you should not continue.

Websites prove their identity via certificates. Firefox does not trust www.google.com because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates. error code : SEC_ERROR_UNKNOWN_ISSUER cant open any sites......after connecting to a hotspot of adguard installed mobile........

Someone could be trying to impersonate the site and you should not continue. Websites prove their identity via certificates. Firefox does not trust www.google.com because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates. error code : SEC_ERROR_UNKNOWN_ISSUER cant open any sites......after connecting to a hotspot of adguard installed mobile........
Screen ƒe photowo kpe ɖe eŋu

All Replies (3)

danielhusnain
danielhusnain
more options

Try updating device, or disabling extensions, apps which may change network settings I see that you wrote that this started to happen after you installed adguard, can you provide information about the phone model and version of android/ios?

danielhusnain
danielhusnain
more options

Also can you provide the firefox version?

FredMcD
FredMcD
more options

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER