liTimer

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "liTimer",
  "version": "1.2",
  "description": "The most simple countdown timer ever",
  "manifest_version": 2,
  "web_accessible_resources": [
    "images/done.png"
  ],
  "icons": {
    "16": "images/16.png",
    "48": "images/48.png",
    "128": "images/128.png"
  },
  "browser_action": {
    "default_icon": "images/19.png",
    "default_popup": "main.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}