Examine source code of IG Grabber — Instagram & TikTok

{
  "manifest_version": 3,
  "name": "IG Grabber — Instagram & TikTok",
  "version": "1.4.5",
  "description": "Télécharge la story réellement affichée (corrige le bug du mauvais story), les publications et reels Instagram, ainsi que les vidéos et photos TikTok (sans watermark). Rangement automatique par profil (dossier au nom d'utilisateur).",
  "browser_specific_settings": {
    "gecko": {
      "id": "ig-grabber@khalilbenaz",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "downloads",
    "storage",
    "declarativeNetRequestWithHostAccess",
    "tabs"
  ],
  "host_permissions": [
    "*://*.instagram.com/*",
    "*://*.cdninstagram.com/*",
    "*://*.fbcdn.net/*",
    "*://*.tiktok.com/*",
    "*://*.tiktokcdn.com/*",
    "*://*.tiktokcdn-us.com/*",
    "*://*.tiktokcdn-eu.com/*",
    "*://*.tiktokcdneu.com/*",
    "*://*.tiktokv.com/*",
    "*://*.tiktokv.us/*",
    "*://*.tiktokv.eu/*",
    "*://*.muscdn.com/*",
    "*://*.byteoversea.com/*",
    "*://*.ibytedtos.com/*",
    "*://*.ibyteimg.com/*",
    "*://*.ttwstatic.com/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "IG Grabber — ouvrir le panneau",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "sidebar_action": {
    "default_title": "IG Grabber — ouvrir le panneau",
    "default_panel": "sidepanel.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*",
        "*://*.tiktok.com/*"
      ],
      "js": [
        "inject.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "*://*.instagram.com/*",
        "*://*.tiktok.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle",
      "world": "ISOLATED"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "inject.js"
      ],
      "matches": [
        "*://*.instagram.com/*",
        "*://*.tiktok.com/*"
      ]
    }
  ]
}