Examine source code of Stay Away

{
  "manifest_version": 3,
  "name": "Stay Away",
  "description": "Block distracting websites using a list that you control.",
  "version": "1.10.0",
  "permissions": [
    "activeTab",
    "alarms",
    "browsingData",
    "cookies",
    "declarativeNetRequest",
    "history",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "core.js",
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "action": {
    "default_title": "Stay Away",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "blocked.html",
        "styles.css",
        "blocked.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "stay-away@example.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}