Get and Set localStorage from Content Script

gistfile1.js

// Content Script to save data.
chrome.extension.sendRequest({storage: 'foo', value: 'bar'});


// Content Script to get data.
chrome.extension.sendRequest({storage: 'foo'}, function(response) {
  console.log('foo => ' + response.storage);
});

// Background Page
chrome.extension.onRequest.addListener(function(request, sender, sendResponse) {
  if (request.storage) {
    if (typeof request.value != 'undefined') {
      localStorage[request.storage] = request.value;
    }
    sendResponse({storage: localStorage[request.storage]});
  } else {
    sendResponse({});
  }
});

sendRequest -> sendMessage
onRequest -> onMessage