firebase storage, pictures is readable also in private mode -

i have problem firebase storage rules, saved picture in firebase storage and, if set read mode in false equally possible see image. after save image in storage change storage rules simple code

service firebase.storage {   match /b/mybucketaddress/o {     match /{allimages=**}{        allow write, read: if false     }       } } 

if put picture address in browser picture still visible (also app, not in browser), how fix problem?