Closure

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Closure",
  "description": "Require confirmation when closing a tab or navigating away from a site",
  "version": "0.1",
  "permissions": [
    "contextMenus",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "manifest_version": 2,
  "web_accessible_resources": [
    "/img/favicon.ico"
  ],
  "options_page": "options/options.html",
  "options_ui": {
    "page": "options/options.html",
    "chrome_style": true
  },
  "icons": {
    "16": "/img/icon16.png",
    "48": "/img/icon48.png",
    "128": "/img/icon128.png"
  }
}