The IndexedDB entry point and global constructors were exposed with `webkit` prefixes as was common circa Chrome 11: webkitIndexedDB (main entry point) webkitIDBKeyRange (non-callable global constructor, but has useful static methods) webkitIDBCursor webkitIDBDatabase webkitIDBFactory webkitIDBIndex webkitIDBObjectStore webkitIDBRequest webkitIDBTransaction (non-callable global constructors) The non-prefixed API shipped in M24 and the prefixed versions deprecated in M38.
Docs: https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API