how to store edited data of chrome extension locally

//  Somewhere in your manifest...

{
    "permissions": [
        "storage"
    ]
}

//  Usage:

//  PERSISTENT Storage - Globally
//  Save data to storage across their browsers...

chrome.storage.sync.set({ "yourBody": "myBody" }, function(){
    //  A data saved callback omg so fancy
});

chrome.storage.sync.get(/* String or Array */["yourBody"], function(items){
    //  items = [ { "yourBody": "myBody" } ]
});

//  LOCAL Storage

// Save data to storage locally, in just this browser...

chrome.storage.local.set({ "phasersTo": "awesome" }, function(){
    //  Data's been saved boys and girls, go on home
});

chrome.storage.local.get(/* String or Array */["phasersTo"], function(items){
    //  items = [ { "phasersTo": "awesome" } ]
});