Fetching my appcache fails in firefox: it starts downloading my items, but at around number 60 or 70 (number varies between runs) out of my 1000 items, the fetching stops and I receive an appcache error. How can I properly debug this, to see what file causes this error? Because the item number varies between runs, I don't exactly know which file I should be looking at.
appcache clear
appcache validate
Any errors will be displayed.