it used to work fine up until a couple days ago how can i fix it
This Connection is Untrusted
You have asked IceDragon to connect
securely to www.facebook.com, but we can’t confirm that your connection is secure.
Normally, when you try to connect securely,
sites will present trusted identification to prove that you are
going to the right place. However, this site’s identity can’t be verified.
What Should I Do? If you usually connect to
this site without problems, this error could mean that someone is
trying to impersonate the site, and you shouldn’t continue.