Investigate fingerprinting/linkability risk with File and Directory Entries API support
Mozilla convinced itself to implemented parts of Chrome's File and Directory Entries API for compatibility reasons (https://developer.mozilla.org/en-US/docs/Web/API/File_and_Directory_Entries_API and https://bugzilla.mozilla.org/show_bug.cgi?id=1265767). We should check whether that one adheres to our design guidelines.