minimal-homepage

It's a minimal new tab page that replaces Firefox's default. Shows the time and allows the user to set a goal for the day.

Additional files are visible only to premium users

{
  "manifest_version": 2,
  "name": "minimal-homepage",
  "version": "1.0",
  "chrome_url_overrides": {
    "newtab": "index.html"
  }
}