Popper

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Popper",
  "description": "Distract yourself by popping the lock",
  "manifest_version": 2,
  "version": "1.0.1",
  "icons": {
    "32": "img/popper_icon_32.png",
    "64": "img/popper_icon_64.png"
  },
  "chrome_url_overrides": {
    "newtab": "popper.html"
  }
}