Examine source code of SkinCalcPlus

{
  "manifest_version": 3,
  "name": "SkinCalcPlus",
  "description": "SC+ provides additional features to Skin.Club to help the user make more informed decisions throughout the site.",
  "version": "1.1.0",
  "content_scripts": [
    {
      "matches": [
        "https://skin.club/*"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "css": [
        "scplus2_global.css",
        "scplus2_case_page.css",
        "scplus2_giveaway_page.css",
        "scplus2_header.css",
        "scplus2_battle.css",
        "scplus2_profile.css"
      ],
      "js": [
        "jquery-3.7.1.min.js",
        "scplus2_main.js",
        "scplus2_case_page.js",
        "scplus2_giveaway_page.js",
        "scplus2_header.js",
        "scplus2_battle.js",
        "scplus2_profile.js",
        "scplus2_selectors.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "SkinCalcPlus@Mopzilla"
    }
  }
}