robots.txt viewer

look into a robots.txt file on websites with a single click.
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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "minimum_chrome_version": "95",
  "author": "Nico Hemkes",
  "name": "robots.txt viewer",
  "short_name": "robots.txt",
  "description": "look into a robots.txt file on websites with a single click.",
  "homepage_url": "https://www.robots-viewer.com/",
  "version": "1.6.1",
  "action": {
    "browser_style": true,
    "default_title": "robots.txt viewer",
    "default_icon": "img/icon_128.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "img/icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "host_permissions": [
    "https://www.robots-viewer.com/"
  ]
}