The storage quota of a storage shelf is a conservative estimate of the -total amount of bytes it can hold. This amount should be less than the total available storage space -on the device to give users some wiggle room. +total amount of bytes it can hold. This amount should be less than the total storage capacity on +the device to give users some wiggle room. This amount should not reflect the available storage +space on the device, to avoid facilitating a cross-origin resource size leak.
User agents are strongly encouraged to consider navigation frequency, recency of visits, bookmarking, and permission for {{"persistent-storage"}} when