Examine source code of Innguma Buttons

{
  "manifest_version": 3,
  "name": "INNGUMA Buttons",
  "description": "Innguma handy features for Information Factory",
  "version": "4.3",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2eb7d4de-42f1-4945-9b5f-cd3acd8624eb}",
      "strict_min_version": "42.0"
    }
  },
  "action": {
    "default_icon": "icon19.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "https://factory.innguma.com/"
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "js": [
        "js/feed-autodiscoverer.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ]
}