Examine source code of Aware Clock

{
  "manifest_version": 2,
  "name": "Aware Clock",
  "version": "1.0",
  "description": "AwareClock keeps you mindful of your time with daily and monthly for better focus.",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e57d158-6eaf-435e-b843-47acc333d1f0}"
    }
  }
}