is it possible to share data of localstorage between tabs?

Question

I have two domains and I need to pass localstorage data from domain A to domain B when execute a botton of the extension that i'm creating?

Answer 1

The easiest way is to use chrome.storage.local. Content scripts in all tabs can access chrome.storage.local.

So, content script in Domain A tab:

chrome.storage.local.set({
  fromDomainA: window.localStorage.getItem('fromDomainA')
});

In contentScript on Domain B tab:

const fromDomainA = await chrome.storage.local.get('fromDomainA');
console.log(fromDomainA);