We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

All websites I go to suddenly have invalid certificates. They all present security concerns. Never ever happened before. Even you own site this happened with. what do I do

more options

Started with this problem a week ago. I cannot access any website without firefox saying that certificate is invalid and the site represents a security risk. Do I want to override. Then the whole process is circuitive. Something very wrong.

Started with this problem a week ago. I cannot access any website without firefox saying that certificate is invalid and the site represents a security risk. Do I want to override. Then the whole process is circuitive. Something very wrong.

All Replies (2)

more options

Did you check your security software (firewall)?

more options

Is the date / time on your PC correct?