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Several websites came back as not secure including Twitter after I used the "Refreh Firefox" button, and some websites images won't show up on

  • 1 odgovor
  • 1 ima to težavo
  • 18 ogledov
  • Zadnji odgovor od FredMcD

H13dawg
H13dawg
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The messages "Your connection is not secure

The owner of twitter.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.

Learn more…

Report errors like this to help Mozilla identify and block malicious sites" and

"Your connection is not secure

The owner of www.adultempire.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

Learn more…

Report errors like this to help Mozilla identify and block malicious sites"

comes up for several websites including Twitter, Tumblr, DeviantArt.com google.com & others

And other websites, images don't show up

None of this happened until after I used the "Refresh Firefox - reset add-ons and settings" feature

The messages "Your connection is not secure The owner of twitter.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website. This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate. Learn more… Report errors like this to help Mozilla identify and block malicious sites" and "Your connection is not secure The owner of www.adultempire.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website. Learn more… Report errors like this to help Mozilla identify and block malicious sites" comes up for several websites including Twitter, Tumblr, DeviantArt.com google.com & others And other websites, images don't show up None of this happened until after I used the "Refresh Firefox - reset add-ons and settings" feature

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FredMcD
FredMcD
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There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites


  • uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
  • configured their website improperly

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