Examine source code of Instagram Button Remover

{
  "manifest_version": 3,
  "name": "Instagram Button Hider",
  "version": "1.1",
  "description": "Hide certain buttons on Instagram on desktop and Firefox for Android.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "instagram-button-hider@local",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.instagram.com/*",
        "*://m.instagram.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "host_permissions": [
    "*://www.instagram.com/*",
    "*://m.instagram.com/*"
  ]
}