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1. View: Open DevTools in your browser and type in console
>>localStorage
2. Backup: You can easily export content of the localStorage to your clipboard (as a string)
>>copy(JSON.stringify(JSON.stringify(localStorage))); // Yes, double stringify
3. Restore: type the below code in the console and reload page
var obj = JSON.parse(/*paste stringified localStorage here*/); // Yes, single parse
Object.keys(obj).forEach(function (k) {
localStorage.setItem(k, obj[k]);
});