Чего то перестали работать примеры с localStorage.
Например
localStorage.setItem('div', '1234567');
alert (localStorage.getItem('div'));
В консоле
Uncaught DOMException: Failed to read the 'localStorage' property from 'Window': Access is denied for this document.
at <anonymous>:1:1
at https://lookatcode.com/pack/lookatcode.1ca389dc29123eff7fb8.js:104:27