Examine source code of Dark Mode For Linguee

{
  "manifest_version": 2,
  "name": "darkModeLinguee",
  "version": "1.1",
  "description": "dark mode for linguee",
  "icons": {
    "48": "icons/zuck.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.linguee.com/*",
        "*://*.deepl.com/*"
      ],
      "js": [
        "darkmode.js"
      ],
      "css": [
        "videocontrols.css",
        "about.min.css",
        "style4-early-late.min.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{155006e6-d2b8-45f2-8b23-6fc36b25c94c}"
    }
  }
}