Examine source code of CheckMyVA Browser Erweiterung

{
  "manifest_version": 2,
  "version": "0.2.0",
  "name": "__MSG_appName__",
  "short_name": "__MSG_appShortName__",
  "description": "__MSG_appDesc__",
  "default_locale": "de",
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "all_frames": false,
      "matches": [
        "*://localhost/*",
        "*://checkmyva.openinc.dev/*"
      ],
      "js": [
        "content_webapp.js"
      ]
    },
    {
      "all_frames": false,
      "matches": [
        "https://takeout.google.com/*"
      ],
      "js": [
        "content_google_takeout.js"
      ]
    },
    {
      "all_frames": false,
      "matches": [
        "https://www.amazon.de/gp/privacycentral/dsar/*"
      ],
      "js": [
        "content_alexa_takeout.js"
      ]
    }
  ],
  "icons": {
    "16": "assets/logo/16.png",
    "48": "assets/logo/48.png",
    "128": "assets/logo/128.png"
  },
  "permissions": [
    "notifications",
    "downloads",
    "storage",
    "unlimitedStorage",
    "file://*",
    "*://localhost/*",
    "*://alexa.amazon.de/*",
    "*://www.amazon.de/alexa-privacy/*",
    "*://parse-checkmyva.apps.openinc.dev/*"
  ],
  "externally_connectable": {
    "matches": [
      "*://localhost/*",
      "*://checkmyva.openinc.dev/*"
    ]
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'; connect-src ws://localhost:*/ file://* https://alexa.amazon.de https://www.amazon.de https://parse-checkmyva.apps.openinc.dev",
  "web_accessible_resources": [
    "assets/img/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "checkmyva@openinc.dev"
    }
  }
}