Examine source code of remote-torrent

{
  "manifest_version": 3,
  "name": "remote-torrent",
  "description": "Remote torrent extension",
  "version": "0.4.1",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArJy7iGhCl9ZnsFxENQ2MzsyQ5nABXYlRobIan5LXwhsZVyrEfgDQXGPVXc7LhcWLnSLSElAhdlRObGi33JCnLHlIgfkzw0dS8c7gvEN0r4BfkuSG4Lx9z7yThafdMCcgabxc99vCS2HTE6HLJTNwXijxcov44ozuQ/lkL+jxmqtumpPqYvDp9rH8L3Q9NCdOIk7sDvx2KfpF+Pn+KQ+QTbNGuqk3EUD+5Wi0rFGm8f+GeY3PRR4DAWc0Fx//IlWnKhXCRwJ9V/CyFAlLtaorzdqvjrUbBBKaAz2Ixb2TbKKmGcVplroq743ZYVvA0lXnUrc7vNadfnCzVnwzDVGXUQIDAQAB",
  "browser_specific_settings": {
    "gecko": {
      "id": "remote-torrent-webext@yae23.ru"
    }
  },
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "permissions": [
    "storage",
    "downloads"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Default Popup Title",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://rutracker.org/forum/viewtopic.php?t=*"
      ],
      "js": [
        "content-scripts/ru-tracker.js"
      ]
    },
    {
      "matches": [
        "*://pornolab.net/forum/viewtopic.php?t=*"
      ],
      "js": [
        "content-scripts/topic.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content-scripts/ru-tracker.css"
      ],
      "matches": [
        "*://rutracker.org/*"
      ]
    },
    {
      "resources": [
        "content-scripts/topic.css"
      ],
      "matches": [
        "*://pornolab.net/*"
      ]
    }
  ]
}