Examine source code of Bookmark Reminder

{
  "manifest_version": 2,
  "name": "Bookmark Reminder",
  "version": "1.0",
  "description": "Remind you to revisit bookmarked pages on a schedule.",
  "permissions": [
    "bookmarks",
    "storage",
    "notifications",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{686a2590-e9fe-49f8-8860-39bc7d7ed959}"
    }
  }
}