I have 2 Solution for this problem :
first you can try this steps:
1. when you got " This connection is Untrusted " message, click I Understand the Risks
2. and then click add exception button
3. and then you will see new windows and then click get Certificate
4. after few second click Confirm Security Exception and then the page will loading normally and you now can login to
facebook.
this is simple way to solve this problem and not permanent, because when you login again we must repeat from step 1 to step
first you can try this steps:
1. when you got " This connection is Untrusted " message, click I Understand the Risks
2. and then click add exception button
3. and then you will see new windows and then click get Certificate
4. after few second click Confirm Security Exception and then the page will loading normally and you now can login to
facebook.
this is simple way to solve this problem and not permanent, because when you login again we must repeat from step 1 to step