Examine source code of hidesuggestions

{
  "manifest_version": 3,
  "name": "hidesuggestions",
  "version": "1.0",
  "description": "hide suggested follows (custom css)",
  "permissions": [
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.instagram.com/*"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hidesuggest1ons@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}