Gradient Clock

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Gradient Clock",
  "version": "1.0",
  "description": "A colourful clock to brigthen up your browser.",
  "manifest_version": 2,
  "incognito": "split",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "icons": {
    "128": "icon.png"
  }
}