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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "NoFoMo: Attention Game",
  "version": "1.25",
  "description": "A simple game to challenge your digital distractions! How long can you go without jumping around tabs & windows?",
  "manifest_version": 2,
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "permissions": [
    "alarms",
    "storage",
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "browser_action": {
    "default_icon": "images/icon.png",
    "default_title": "NoFoMo",
    "default_popup": "nofomo.html"
  }
}