Examine source code of Magic Downloader

{
  "manifest_version": 3,
  "name": "Magic Downloader",
  "version": "0.5.43",
  "description": "Fast download manager companion: grab videos (HLS/DASH/MP4) with a button right on the player, plus capture normal downloads.",
  "permissions": [
    "contextMenus",
    "downloads",
    "storage",
    "notifications",
    "activeTab",
    "tabs",
    "webRequest",
    "webNavigation"
  ],
  "optional_permissions": [
    "cookies"
  ],
  "host_permissions": [
    "http://127.0.0.1/*",
    "http://localhost/*",
    "*://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "action": {
    "default_title": "Magic Downloader — detected videos",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "magic-downloader@local.extension",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "websiteActivity",
          "websiteContent"
        ],
        "optional": [
          "authenticationInfo"
        ]
      }
    }
  }
}