Examine source code of Remind Me

{
  "manifest_version": 2,
  "name": "Remind Me",
  "version": "1.0",
  "description": "Save your URLs/Notes to be reminded to you later!",
  "permissions": [
    "storage",
    "notifications",
    "tabs",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{47c8efd9-52af-4122-a466-33d86f9333a8}"
    }
  }
}