Examine source code of Quick Copy Roblox IDs

{
  "name": "Quick Copy Roblox IDs",
  "short_name": "Quick Copy Ro-IDs",
  "version": "1.0.4",
  "description": "Adds a right click context menu item on https://www.roblox.com for quickly copying asset and user IDs.",
  "manifest_version": 2,
  "icons": {
    "16": "img/icon_16.png",
    "48": "img/icon_48.png",
    "128": "img/icon_128.png"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "src/index.js"
    ],
    "persistent": false
  }
}