Comment 2 for bug 1531585

It looks like this is a result of the modification date in that list being in the format "06/01/16 10:56". extensions/adblock/updater.vala has logic to check for '-' or '.' separators to find a numeric date string but not '/', and assumes that any string without either of those two characters will have three space-separated fields. This one doesn't, so it crashes.

I'm not sure where one finds detailed documentation on the Adblock list format. We can fix the crash but I don't know which date formats we should actually accept, and whether this block list's date is malformed or correct.