Examine source code of Screen Time Tracker

{
  "manifest_version": 3,
  "name": "Screen Time Tracker",
  "version": "2.5",
  "description": "Tracks time spent on websites.",
  "permissions": [
    "tabs",
    "storage",
    "alarms",
    "declarativeNetRequest"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Web Time Tracker",
    "default_popup": "popup/popup.html"
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "dashboard/blocked.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "screen-time@ravewyvern.me",
      "strict_min_version": "114.0"
    }
  }
}