Bug 853388: Save and load XPIProvider state to/from a JSON file; r=unfocused
Bug 853388: Upgrade existing SQLITE databases to JSON
Bug 853388: Remove transaction model of database flush control and implement async save of database
Bug 853388: Trigger XPI database conversion from SQLITE based on schema version preference
Bug 853388: Load JSON database asynchronously outside of startup
Bug 853388: Keep trying to save JSON even if read or save fails