Examine source code of BuxBack - Roblox Cashback

{
  "manifest_version": 3,
  "name": "BuxBack - Roblox Cashback",
  "version": "1.0.1",
  "description": "Get 10-30% cashback on Roblox catalog purchases!",
  "author": "support@buxback.net",
  "browser_specific_settings": {
    "gecko": {
      "id": "buxback@buxback.com",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "https://www.roblox.com/*",
    "https://catalog.roblox.com/*",
    "https://web.roblox.com/*",
    "https://www.buxback.net/*"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.roblox.com/catalog",
        "https://www.roblox.com/catalog/*",
        "https://www.roblox.com/catalog?*",
        "https://www.roblox.com/bundles/*",
        "https://web.roblox.com/catalog",
        "https://web.roblox.com/catalog/*",
        "https://web.roblox.com/catalog?*",
        "https://web.roblox.com/bundles/*"
      ],
      "js": [
        "content/catalog.js",
        "content/itempage.js"
      ],
      "css": [
        "content/styles.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://www.roblox.com/games/*",
        "https://web.roblox.com/games/*"
      ],
      "js": [
        "content/gamedetail.js"
      ],
      "css": [
        "content/styles.css"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}