Every single page from a MAC is blocked now saying invalid security certificate since I updated FF yesterday!
See above. I can't access any page now. They are all being blocked and no exceptions are allowed.
These are all legitimate sites.
Chosen solution
Hi jharrington, the most common reason for this problem is that there is a security program on your computer intercepting your web browsing. In order to scan all your web traffic, it needs to generate fake certificates for each secure site you visit. Until Firefox is set up to trust the program, it will reject every single one of those fake certificates.
Could you check these two articles to see whether they help resolve the issue, or at least point to a particular culprit?
- What do the security warning codes mean?
- How to troubleshoot security error codes on secure websites
All Replies (2)
Chosen Solution
Hi jharrington, the most common reason for this problem is that there is a security program on your computer intercepting your web browsing. In order to scan all your web traffic, it needs to generate fake certificates for each secure site you visit. Until Firefox is set up to trust the program, it will reject every single one of those fake certificates.
Could you check these two articles to see whether they help resolve the issue, or at least point to a particular culprit?
Yep, it was Avast causing it. Thanks!