// storage

what is State partitioning conformance?

Modern engines partition storage and cache by top-level site (Chrome 115+, Firefox 103+ Total Cookie Protection). A claimed version must exhibit the partitioning it should: cross-top-site third-party reads on a partitioned version contradict the UA, and even first-party storage being blocked points to Tor/Brave-strict/headless. Related Website Sets cross-sibling access without a prompt is Chrome-only.. Distilled from the richards storage-signals catalog (partitioning group).