Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

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

cant access gmail "your connection is not secure"

more options

mozilla will not let me access facebook, gmail or any general search!!! "mail.google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER:

SUCH A LOT OF FUSS!! SHould i just change to another engine?

mozilla will not let me access facebook, gmail or any general search!!! "mail.google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER: SUCH A LOT OF FUSS!! SHould i just change to another engine?

Chosen solution

Well, if you like Firefox, take a few minutes to get to the bottom of it. Usually it's a temporary incompatibility with your security software that causes the message. Could you check the following article and see whether that points to the culprit:

How to troubleshoot security error codes on secure websites

Read this answer in context 👍 0

All Replies (1)

more options

Chosen Solution

Well, if you like Firefox, take a few minutes to get to the bottom of it. Usually it's a temporary incompatibility with your security software that causes the message. Could you check the following article and see whether that points to the culprit:

How to troubleshoot security error codes on secure websites