Examine source code of ManyChat RTL Extension

{
  "manifest_version": 2,
  "name": "ManyChat RTL Extension",
  "version": "3.3",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnwzoiiS3vc+Kvc0zH6SjxMvg34evHb0+bgKZYvsIzW8zeZguuuzZeeF2s2EzxNfLdARu/S9cbTKiEUGOJd35MPtxdKBSesQ/Umwi9rcLhgV/726ojdWHLEr0DslH+TKExOnYmeG1UA6sNtUUOLN/U6TbtFTO1GZxGLcxvG1phFnKEYirBZLaAXHmF4sv+k268sTJXqpZHA8G4vDdcVFSmn3VK9g9E4hekEJQl9oHspa8VxCbVu0kvt9zRF0aI5Vunvzw+yX724pG+F+1EBezt6ZUpa/Pa3mIIszzfxpov+z+zhFN2dfpMXlSWgwhTMshiNlEiyOKh2iOUNDyCZLrYQIDAQAB",
  "description": "Automatically apply RTL text direction for builder text blocks on ManyChat",
  "browser_action": {
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "16": "assets/images/icons/AppIcon-16px.png",
    "32": "assets/images/icons/AppIcon-32px.png",
    "48": "assets/images/icons/AppIcon-48px.png",
    "128": "assets/images/icons/AppIcon-128px.png"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "persistent": false
  },
  "oauth2": {
    "client_id": "156166325492-jo9lkge6t634mt6hf50l5irpi9q9o7tp.apps.googleusercontent.com",
    "scopes": [
      "openid",
      "email",
      "profile"
    ]
  },
  "permissions": [
    "storage",
    "activeTab",
    "https://webhookon.com/*",
    "https://www.webhookon.com/*",
    "https://*.manychat.com/*",
    "https://openidconnect.googleapis.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.manychat.com/*"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "content/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c628ce42-78cc-4d3f-92b8-06e330492c0c}"
    }
  }
}