Examine source code of Forocoches premium

{
  "name": "Forocoches premium",
  "version": "2.1.0",
  "description": "Forocoches en esteroides",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://*.forocoches.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ehtiotumolas@forocoches.com",
      "strict_min_version": "42.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.forocoches.com/*"
      ],
      "run_at": "document_start",
      "all_frames": false,
      "js": [
        "/static/thirdParty/jquery-3.6.3.min.js",
        "/static/thirdParty/jquery.minicolors.js",
        "/static/contentScript.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "static/background.js"
    ]
  },
  "commands": {
    "Ctrl+Z": {
      "suggested_key": {
        "default": "Alt+Shift+Z"
      }
    }
  },
  "action": {
    "default_icon": {
      "16": "/static/images/icon16.png",
      "32": "/static/images/icon32.png"
    },
    "default_title": "Forocoches premium",
    "default_popup": "templates/popup.html"
  },
  "icons": {
    "16": "/static/images/icon16.png",
    "32": "/static/images/icon32.png",
    "48": "/static/images/icon48.png",
    "128": "/static/images/icon128.png"
  },
  "manifest_version": 3
}