Examine source code of focus chirp

{
  "name": "focus chirp",
  "version": "1.0.2",
  "manifest_version": 2,
  "author": "Mel Bourgeois",
  "homepage_url": "https://ko-fi.com/focuschirp",
  "description": "a simple reminder bell that helps you stay on task.",
  "icons": {
    "16": "images/icon-16.png",
    "24": "images/icon-24.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "focuschirp@example.com"
    }
  },
  "browser_action": {
    "default_title": "focus chirp",
    "default_icon": {
      "16": "images/icon-16.png",
      "24": "images/icon-24.png",
      "32": "images/icon-32.png",
      "48": "images/icon-48.png",
      "96": "images/icon-96.png",
      "128": "images/icon-128.png"
    },
    "default_popup": "dist/popup/index.html"
  },
  "background": {
    "scripts": [
      "dist/timer.js"
    ]
  }
}