Examine source code of Limit the Web

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "description": "__MSG_appDescription__",
  "version": "1.4.4",
  "default_locale": "en",
  "permissions": [
    "storage",
    "alarms",
    "tabs",
    "scripting",
    "webNavigation"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "action": {
    "default_title": "__MSG_appName__",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "blocked.html",
        "icons/*.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "author": "JF Studio",
  "homepage_url": "https://jfstudio.dev",
  "developer": {
    "name": "JF Studio",
    "url": "https://ko-fi.com/jfstudio"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "limit-the-web@jfstudio.dev",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "collection": {
          "storage": {
            "purpose": "To save user preferences including tracked websites, daily time limits, language, and theme settings.",
            "usage": "All settings and usage counters are stored locally on the user's device using browser.storage.local. No data is transmitted to external servers."
          },
          "alarms": {
            "purpose": "To reset daily usage counters at midnight and to keep the background script active.",
            "usage": "Two alarms are scheduled locally: a daily midnight reset alarm and a keepalive alarm that fires every minute. All processing is done locally in the browser."
          },
          "webNavigation": {
            "purpose": "To detect when the user navigates to a tracked website and check whether the daily time limit has been reached.",
            "usage": "Navigation events are intercepted locally to redirect the user to a blocking page when their configured daily limit is exceeded. No browsing data is collected or transmitted."
          }
        },
        "privacy_policy_url": "https://jfstudio.dev/privacy-policies/limit-the-web/PRIVACY.md"
      }
    }
  }
}