Examine source code of AHideIcon

{
  "manifest_version": 2,
  "name": "AHideIcon",
  "version": "1.2resigned1",
  "description": "Chrome delete css element",
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "https://allegro.pl/login/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3455db6e-ccf7-46ef-8c9e-d1cf1f415b82}"
    }
  }
}