Examine source code of Unplug

{
  "manifest_version": 3,
  "name": "Unplug",
  "version": "1.3.0",
  "description": "Remove distracting and addictive elements from YouTube and Reddit. Take back control of your attention.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://*.ytimg.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "unplug@unplug-extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_popup": "popup/popup.html",
    "default_title": "Unplug"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "lib/browser-polyfill.js",
        "lib/settings.js",
        "lib/picker.js",
        "lib/clickbait.js",
        "content/unplug.js"
      ],
      "css": [
        "content/unplug.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.reddit.com/*"
      ],
      "js": [
        "lib/browser-polyfill.js",
        "lib/settings.js",
        "lib/picker.js",
        "content/reddit.js"
      ],
      "css": [
        "content/reddit.css"
      ],
      "run_at": "document_start"
    }
  ]
}