Examine source code of DarkMode News

{
  "name": "DarkMode News",
  "manifest_version": 2,
  "version": "0.3",
  "description": "News Websites will automatically go to dark mode.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "logo-48.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "logo-16.png",
    "48": "logo-48.png",
    "128": "logo-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.digi24.ro/*",
        "*://*.theguardian.com/*",
        "*://*.reuters.com/*",
        "*://*.bbc.com/*",
        "*://*.foreignaffairs.com/*",
        "*://*.dw.com/*",
        "*://*.ft.com/*",
        "*://*.chicagotribune.com/*",
        "*://*.apnews.com/*",
        "*://*.europa.eu/*",
        "*://*.2lib.org/*"
      ],
      "js": [
        "/js/functions.js",
        "run.js"
      ]
    },
    {
      "matches": [
        "*://*.digi24.ro/*"
      ],
      "js": [
        "/js/digi24.js"
      ]
    },
    {
      "matches": [
        "*://*.dw.com/*"
      ],
      "js": [
        "/js/dw.js"
      ]
    },
    {
      "matches": [
        "*://*.bbc.com/*"
      ],
      "js": [
        "/js/bbc.js"
      ]
    },
    {
      "matches": [
        "*://*.theguardian.com/*"
      ],
      "js": [
        "/js/theguardian.js"
      ]
    },
    {
      "matches": [
        "*://*.2lib.org/*"
      ],
      "js": [
        "/js/2lib.js"
      ]
    }
  ]
}