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!

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

My gmail won't open in Firefox, the answers listed on this site don't work.

  • 2 replies
  • 2 have this problem
  • 2 views
  • Last reply by cor-el

more options

www.gmail.com doesn't work. the system clocks, then tells me: Secure Connection Failed.

I have tried some of the other answers listed, with no luck.  please help.
www.gmail.com doesn't work. the system clocks, then tells me: Secure Connection Failed. I have tried some of the other answers listed, with no luck. please help.

All Replies (2)

more options

Hi, you don't say exactly what you've tried, so please see if anything here helps - Secure connection failed and Firefox did not connect.

If you are still having a problem, try deleting all references to the website in question, as shown under the heading 'How do I remove a single website from my history?' in this article - Delete browsing, search and download history on Firefox, then try the site again.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you.

more options

If you can't inspect the certificate via "I Understand the Risks" then try this:

Open the "Add Security Exception" window by pasting this chrome URL in the Firefox location/address bar and check the certificate:

  • chrome://pippki/content/exceptionDialog.xul

In the location field of this window type or paste the URL of the website.

  • retrieve the certificate via the "Get certificate" button
  • click the "View..." button to inspect the certificate in the Certificate Viewer

You can inspect details like the issuer and the certificate chain in the Details tab of the Certificate Viewer. Check who is the issuer of the certificate. If necessary then you can attach a screenshot that shows the certificate viewer.


There is security software like Avast and Kaspersky and BitDefender that intercept secure connections and send their own certificate.

If you have Avast then try to disable HTTPS scanning in Avast Web Shield.