In a new app we developed which has offline support with the help of HTML5 appcache feature. We noticed that with the latest update from FF (27.0+) the appcache stopped working and it's not caching any of the resources specified in the .manifest file. In the Tools - Options - Advanced - Network tab also it shows as 0 Bytes from the domain. But at the same time it works fine on Chrome as it is properly showing all the cached resources from the domain. Is this some kind of bug in the latest FF or are we missing something from our end to make the FF cache the resources. Please let me know if you would require more details for this issue. Any help would be really appreciated.