Log Message:
firefox68: Update to 68.4.1

This release fixes one zero-day vulnerability:

CVE-2019-17026: IonMonkey type confusion with StoreElementHole and \ 
FallibleStoreElement

Incorrect alias information in IonMonkey JIT compiler for setting array elements \ 
could lead to a type confusion.
We are aware of targeted attacks in the wild abusing this flaw