Examine source code of HealthyTab

{
  "manifest_version": 3,
  "name": "HealthyTab",
  "version": "2.0.0",
  "description": "Your mindful wellbeing companion — gentle, adaptive, context-aware.",
  "permissions": [
    "storage",
    "notifications",
    "alarms",
    "idle",
    "tabs"
  ],
  "host_permissions": [
    "https://*.healthytab.app/*"
  ],
  "background": {
    "service_worker": "background/background.js",
    "scripts": [
      "background/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "healthytab@pa28m.desktop",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_page": "options/options.html",
  "web_accessible_resources": [
    {
      "resources": [
        "assets/sounds/*.mp3"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}