Removing HTML5 Appcache
Once you have a manifest in your <html>, the resources are cached in your user's browser.
And if you don't want this feature any more and delete the manifest attribute, your user won't be able to load new resources because Chrome and most browsers failed to check update for the cache and they will keep the cache.
The only way to remove cache from your side, is to return a 404 or 410 for the manifest request. That is, removing the file on the server.
Written by Sun Ning
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