Examine source code of SnapFox

{
  "name": "SnapFox",
  "description": "dark mode for snap.berkeley.edu",
  "version": "1.7.1",
  "version_name": "1.7.1-firefox",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "/icons/icon16.png",
    "48": "/icons/icon48.png",
    "128": "/icons/icon128.png"
  },
  "browser_action": {
    "default_title": "SnapFox",
    "default_icon": "/icons/icon48.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://snap.berkeley.edu/*"
      ],
      "css": [
        "loader.css",
        "style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9a708112-ff4b-47d3-b1e5-dcb2536b64b1}"
    }
  }
}