MassMerge: Latest mail merge for Gmail

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "MassMerge: Latest mail merge for Gmail",
  "version": "1.2",
  "description": "A powerful tool for cold email, mass mail, and mail merge for Gmail",
  "permissions": [
    "cookies",
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "https://mail.google.com/",
    "https://inbox.google.com/",
    "https://kineto.massmerge.co/"
  ],
  "icons": {
    "16": "image/icon16.png",
    "32": "image/icon32.png",
    "48": "image/icon48.png",
    "128": "image/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*",
        "https://inbox.google.com/*"
      ],
      "js": [
        "inboxsdk.js",
        "myapp.js",
        "loader.js",
        "/js/jquery.min.js",
        "helpermethod.js",
        "constant.js",
        "jquery.js",
        "jquery.datetimepicker.full.js"
      ],
      "css": [
        "custome.css",
        "custom1.css",
        "loader.css",
        "jquery.datetimepicker.css"
      ]
    }
  ],
  "background": {
    "service_worker": "background.js"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "pageWorld.js"
      ],
      "matches": [
        "https://mail.google.com/*",
        "https://inbox.google.com/*"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  }
}