Examine source code of Instagram Web Enhancer

{
  "manifest_version": 2,
  "name": "Instagram Web Enhancer",
  "version": "1.0.0",
  "description": "Cleaner, more app-like Instagram on Firefox mobile, plus a Save button for Reels and videos.",
  "browser_specific_settings": {
    "gecko": {
      "id": "ig-web-enhancer@personal.example",
      "strict_min_version": "120.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "permissions": [
    "downloads",
    "webRequest",
    "storage",
    "*://*.instagram.com/*",
    "*://*.cdninstagram.com/*",
    "*://*.fbcdn.net/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  }
}