manifest.json

{
    "name": "Browser Schedular",
    "version": "1.0",
    "description": "Schedule task on your browser",
    "background": {
        "scripts": ["js/background.js"],
        "persistent": false
      },
      "permissions": ["windows", "storage", "declarativeContent", "notifications", "http://*/*"],
    "browser_action": {
        "default_popup": "ui/index.html",
        "default_icon": {
            "16": "icons/schedule_icon.png",
            "32": "icons/schedule_icon.png",
            "48": "icons/schedule_icon.png",
            "128": "icons/schedule_icon.png"
          }
      },
      "icons": {
        "16": "icons/schedule_icon.png",
        "32": "icons/schedule_icon.png",
        "48": "icons/schedule_icon.png",
        "128": "icons/schedule_icon.png"
      },
    "content_scripts": [
        {
        "matches" : ["http://*/*", "https://*/*"],
        "css": ["css/style.css"],
        "js" : ["js/read_data.js", "js/getObject.js", "js/write_data.js"]
        }
    ],
    "manifest_version": 2
  }