Examine source code of Eggzactly

{
  "manifest_version": 2,
  "name": "Perfect Egg Timer",
  "version": "1.0.1",
  "description": "Time your eggs perfectly - soft, medium, or hard boiled",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "alarms",
    "notifications",
    "storage"
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "Eggzactly@gmail.com",
      "strict_min_version": "58.0"
    }
  }
}