Examine source code of Reduction

{
  "manifest_version": 3,
  "name": "Reduction",
  "description": "minimal new tab page",
  "version": "1.2.5",
  "icons": {
    "128": "icon_128.png"
  },
  "action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "author": "Maneesh Wijewardhana",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7d5e960b-480e-434f-9257-bcc8a72102cb}",
      "strict_min_version": "42.0"
    }
  }
}