Examine source code of FGR sidebar remover

{
  "manifest_version": 2,
  "name": "FGR sidebar remover",
  "version": "1.0",
  "description": "Removes the sidebar from the Fitgirl Repacks website",
  "homepage_url": "https://github.com/TiramisuAddict",
  "icons": {
    "48": "ui/FGRR-48.png",
    "96": "ui/FGRR-96.png"
  },
  "permissions": [
    "activeTab",
    "https://fitgirl-repacks.site/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://fitgirl-repacks.site/*"
      ],
      "js": [
        "src/script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_title": "FGR sidebar remover",
    "default_popup": "src/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{046f38d8-b485-4202-b4fa-4a6d40d7ed46}"
    }
  }
}