Examine source code of TAB - Take A Break

{
  "manifest_version": 2,
  "name": "TAB - Take A Break",
  "version": "0.1",
  "description": "Reminds users to take breaks for eye care, posture correction, hydration, and stretching.",
  "permissions": [
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/logo-16.png",
      "48": "icons/logo-48.png",
      "64": "icons/logo-64.png",
      "128": "icons/logo-128.png"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "web_accessible_resources": [
    "popup/popup.html",
    "icons/logo-16.png",
    "icons/logo-48.png",
    "icons/logo-64.png",
    "icons/logo-128.png"
  ],
  "icons": {
    "16": "icons/logo-16.png",
    "48": "icons/logo-48.png",
    "64": "icons/logo-64.png",
    "128": "icons/logo-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fa929499-30ba-48af-b735-6b4b7edf361e}"
    }
  }
}