I am wondering if the Web reputation score has slipped below what is allowed.   It worked prior to today.  However, attempting to update firefox is met with failure.  I added an explicit allow for it on a test user but it still comes up as blocked.  When this happened to me before (different URL) I added the URL to a policy I use for testing.  The last time this happened with a different URL - no matter what I did, the threat reputation score took precedence over the allow policy.  I had to make FirePower ignore the score in order to get it to work!   There must be a reason it is blocked.  Is Firefox's home page hacked?

Ot sure waht you can do about it at this time.