I think this is a pretty important issue so I'm bringing it up again, hoping it can get fixed. I have noticed that HTML5 apps will freeze if the WiFi drops or if your Internet connection fails, even temporarily. So, a user could be playing your game and then it will inexplicably freeze and not recover. The user, of course, will have no idea why this is occurring and will assume that you messed something up in programming. In reality, they may have had a short drop in their WiFi connection.
There is an option (allow offline) in the HTML5 runtime that should solve this problem but it has been grayed out for a couple of years now. I think it is crucial to get this working. Otherwise, HTML5 apps will always be hopelessly buggy, especially anywhere where the WiFi connection is not great. I work in a high school and make educational games. Schools have notoriously bad WiFi that frequently drops on user devices, so it is very frustrating for teachers and students.
Is there any way this can be fixed? Please... it would be the best!