yes, the localstorage is the way to go You save stuff to localstorage in one tab, and in other tab you listen to "storage" event: window.addEventListener(

yes, the localstorage is the way to go You save stuff to localstorage in one tab, and in other tab you listen to "storage" event: window.addEventListener('storage', function() {..}) [0] https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage... [1] https://developer.mozilla.org/en-US/docs/Web/Events/storage https://developer.mozilla.org/en-US/docs/Web/Events/storage Another option is shared web workers, though I never used it. [2] http://stackoverflow.com/questions/12107424/communication-between-browser-tab http://stackoverflow.com/questions/12107424/communication-be... [3] https://developer.mozilla.org/en-US/docs/Web/API/SharedWorker https://developer.mozilla.org/en-US/docs/Web/API/SharedWorke... I confused things in my other comment (I deleted it)