Examine source code of Gumroad Remove Tracking

{
  "manifest_version": 2,
  "name": "Gumroad Remove Tracking",
  "version": "1.0.0",
  "description": "Automatically removes tracking parameters from page urls and links on Gumroad search and storefronts.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png",
    "512": "icons/icon-512.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.gumroad.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dd9e4968-59e7-4a67-a798-bb3baa51173a}"
    }
  }
}