Examine source code of KDP Sales Notifications

{
  "name": "KDP Sales Notifications",
  "description": "Get notified whenever you make new sales.",
  "version": "2.0.7",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "notifications",
    "storage",
    "https://www.kindle-prime.com/*",
    "https://*.amazon.com/*",
    "https://*.amazonaws.com/*"
  ],
  "background": {
    "scripts": [
      "js/jquery-3.4.1.min.js",
      "js/moment.js",
      "js/xlsx.full.min.js",
      "js/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "KDP Sales Notifications",
    "default_popup": "popup/index.html"
  },
  "icons": {
    "16": "images/icon_16.png",
    "32": "images/icon_32.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png"
  },
  "web_accessible_resources": [
    "popup/*",
    "sounds/*",
    "images/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sales_notifs_addon@kindle-prime.com",
      "strict_min_version": "48.0"
    }
  }
}