Examine source code of Remotivation

{
  "browser_specific_settings": {
    "gecko": {
      "id": "remotivation@rissik.ru",
      "strict_min_version": "54.0"
    }
  },
  "chrome_url_overrides": {
    "newtab": "dashboard.html"
  },
  "chrome_settings_overrides": {
    "homepage": "dashboard.html"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": false,
    "open_in_tab": true
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "description": "Replace new tab page with Remotivation",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "manifest_version": 2,
  "name": "Remotivation",
  "offline_enabled": true,
  "version": "1.1.0"
}