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.

Mozilla Support में खोजें

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

When I try to open Firefox, error message "api.xmarks.com:443 uses and invalid security certificate" appears and Mozilla does not start. How do I solve this problem?

  • 1 प्रत्युत्तर दें
  • 130
  • 1 view
  • के द्वारा अंतिम प्रतियुतर Ziggy Maes

more options

I've installed "xmarks" on my desktop. It was working fine for last two months. However, since today morning I'm facing this problem. How do I add this exception, if Mozilla is not opening?

I've installed "xmarks" on my desktop. It was working fine for last two months. However, since today morning I'm facing this problem. How do I add this exception, if Mozilla is not opening?

All Replies (1)

more options

Hi there,

The problem seems to be related to xmarks and not to Firefox. You could add an exception by attempting to open Firefox in Diagnose Firefox issues using Troubleshoot Mode . However, if you contact them they might take a look at it and confirm whether it's related to Firefox or xmarks.

Regards, Ziggy