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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Happy timer",
  "short_name": "Happy timer",
  "description": "Over 90 parents and teachers have discovered this cute and useful timer.",
  "version": "1.6",
  "minimum_chrome_version": "38",
  "icons": {
    "128": "assets/icon_128.png"
  },
  "app": {
    "background": {
      "scripts": [
        "background.js"
      ]
    }
  }
}