Frequently visited websites

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Frequently visited websites",
  "description": "Provides a dropdown list of frequently visited sites.",
  "version": "0.1",
  "browser_action": {
    "default_icon": "icon_new.png",
    "default_popup": "recent_urls.html"
  },
  "background": {
    "scripts": [
      "recent_urls_events.js"
    ],
    "persistent": true
  },
  "permissions": [
    "storage",
    "tabs",
    "notifications",
    "webNavigation"
  ]
}