Side Questions, whats the current html5 offline stroage or best html5 offline storage mechanism.
At the moment, Salesforce1 is not capable of serving VF pages offline. This has been discussed here as well.
Quoting the Salesforce1 guide: – Salesforce Classic remains the best option if you need offline support, – use of Custom App (not Salesforce1 Platform) to configure and control complex offline behavior (Mobile SDK only)
FWIW, there’s an open idea for Salesforce1 offline support if you’d like to vote for it.