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

UK Gov certificate reported in Firefox but page works in other browsers

more options

Hi I LOVE Firefox but recently it has put a "Warning: Potential Security Risk Ahead" block on a UK government based web site for Birth, Marriages and Deaths - https://www.gro.gov.uk/gro/content/certificates/Login.asp. This link works in other browsers. Please advise. Thanks.

Hi I LOVE Firefox but recently it has put a "Warning: Potential Security Risk Ahead" block on a UK government based web site for Birth, Marriages and Deaths - https://www.gro.gov.uk/gro/content/certificates/Login.asp. This link works in other browsers. Please advise. Thanks.

All Replies (1)

more options

Firefox doesn't have a root certificate for the certificate issuer for that site. SEC_ERROR_UNKNOWN_ISSUER The cert chain is incomplete, according to tests. Firefox is more strict about this than other browsers, which is likely the problem.

(There are other issues with the cert as well, and would hope HM Passport Office in Merseyside finds a better source than QuoVadis Limited in the Bahamas.)