Examine source code of FocusWall

{
  "manifest_version": 3,
  "name": "FocusWall - Site Blocker & Focus Timer",
  "version": "1.0.0",
  "description": "Block distracting sites permanently or activate a focus timer that only allows whitelisted domains.",
  "permissions": [
    "storage",
    "webNavigation",
    "alarms",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "blocked.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "focuswall@osion.ch",
      "strict_min_version": "142.0",
      "strict_min_version_android": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}