Examine source code of Mindful Pause

{
  "manifest_version": 3,
  "name": "Mindful Pause",
  "version": "5.1",
  "description": "Mindful Pause: pause distracting websites",
  "permissions": [
    "storage",
    "activeTab",
    "declarativeNetRequest",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon48.png"
  },
  "options_page": "options.html",
  "web_accessible_resources": [
    {
      "resources": [
        "block.html",
        "background.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "35649378429038456378925@protonmail.com",
      "strict_min_version": "109.0"
    }
  }
}