Global value for localStorage as oppossed to per domain

What happens when we use localStorage in a Chrome extension ?

localStorage.setItem('foo', 'bar');

foo is stored in its respective localStorage for every website we visit ?

So 10 different website visits mean 10 versions of foo ?

Is there a way to store foo globally ?

>Solution :

If you use chrome.storage.local, you can store data "globally" for the entire extension. But only the extension will have access to it, websites will not.

https://developer.chrome.com/docs/extensions/reference/storage/