Examine source code of Daily Affirmation

{
  "manifest_version": 2,
  "name": "Daily Affirmation",
  "version": "1.0",
  "description": "Show a positive affirmation each day on the new tab page.",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b593b3e6-12b0-4e4a-bee9-14da636d41c4}"
    }
  }
}