Examine source code of Torrent to Wveweb

{
  "manifest_version": 2,
  "name": "Torrent to Web",
  "version": "2.0.2",
  "description": "Allows to send torrent files to web clients.",
  "icons": {
    "48": "/icons/icon-48.png"
  },
  "applications": {
    "gecko": {
      "id": "torrent-to-web@dasprids.de",
      "strict_min_version": "57.0"
    }
  },
  "permissions": [
    "<all_urls>",
    "contextMenus",
    "notifications",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "options_ui": {
    "page": "/options/options.html"
  },
  "background": {
    "scripts": [
      "/background/main.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "/content/capture-magnet-links.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "/icons/error.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{5bd7e544-5715-41a6-bcb3-e8539107ae85}"
    }
  }
}