Examine source code of Modality Application Extension

{
  "manifest_version": 3,
  "name": "Modality Application Extension",
  "short_name": "Modality Extension",
  "version": "2.5",
  "action": {
    "default_icon": {
      "16": "img/icon16.png",
      "24": "img/icon24.png",
      "32": "img/icon32.png"
    },
    "default_title": "Modality Application Extension"
  },
  "description": "This extension improves the user experience in the Modality application.",
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "author": "Modality Software Solutions B.V.",
  "permissions": [
    "tabs"
  ],
  "host_permissions": [
    "http://*.modality.local/*",
    "https://*.modality.local/*",
    "http://*.modality.dev/*",
    "https://*.modality.dev/*",
    "http://*.modality.phptest/*",
    "https://*.modality.phptest/*",
    "http://*.modality.test/*",
    "https://*.modality.test/*",
    "https://*.modality.nl/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*.modality.local/*",
        "https://*.modality.local/*",
        "http://*.modality.dev/*",
        "https://*.modality.dev/*",
        "http://*.modality.phptest/*",
        "https://*.modality.phptest/*",
        "http://*.modality.test/*",
        "https://*.modality.test/*",
        "https://*.modality.nl/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bf3599fb-2cb4-4592-ab27-a9dea65da35c}",
      "strict_min_version": "109.0"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  }
}