Examine source code of Remove1337xOverlay

{
  "manifest_version": 2,
  "name": "Remove1337xOverlay",
  "version": "1.2",
  "description": "Removes the invisible clickable overlay on 1337x.",
  "content_scripts": [
    {
      "matches": [
        "*://*.mozilla.org/*"
      ],
      "js": [
        "remove-overlay.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{af90ce56-d8da-4703-b6db-cd502c6fa708}"
    }
  }
}