CONSOLE ERROR: line 152: Uncaught TypeError: Cannot read property 'unregister' of undefined This is a testharness.js-based test. PASS CacheStorage PASS CacheStorage.open PASS CacheStorage.open with an empty name PASS CacheStorage.open with no arguments PASS CacheStorage.has with existing cache PASS CacheStorage.has with nonexistent cache PASS CacheStorage.open with existing cache PASS CacheStorage.delete with existing cache PASS CacheStorage.delete with nonexistent cache FAIL CacheStorage names are DOMStrings not USVStrings assert_true: keys assert_unreached: unregister should include cache with bad name expected true got false not fail: Failed to get a ServiceWorkerRegistration: The URL protocol of the current origin ('file://') is not supported. Reached unreachable code Harness: the test ran to completion.