Worthwhile: New Tab Life Countdown Clock

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "content_security_policy": "script-src 'self' 'sha256-ARtFwyft8WzhMJQ1P5aoz+R9PhqtRFzHzMPUpTGbSqc='; object-src 'self'",
  "name": "Worthwhile: New Tab Life Countdown Clock",
  "description": "Replace new tab page with a life countdown clock featuring weather, inspiration, and weather-based dynamic backgrounds.",
  "version": "1.0.0",
  "icons": {
    "16": "./images/worthwhile-logo-16.png",
    "32": "./images/worthwhile-logo-32.png",
    "48": "./images/worthwhile-logo-48.png",
    "128": "./images/worthwhile-logo-128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "./images/worthwhile-logo-16.png",
      "32": "./images/worthwhile-logo-32.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}