Examine source code of Your daily C2D

{
  "name": "Your daily C2D",
  "description": "အရေးတော်ပုံအောင်ရမည်",
  "manifest_version": 2,
  "version": "1.0.0",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png"
    },
    "default_popup": "/index.html#/setting"
  },
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ],
    "persistent": true
  }
}