manifest.json

{
    "manifest_version": 3,
    "name": "Code Diff Checker",
    "version": "1.0",
    "description": "A simple code or text diff checker that highlights the differences between two text inputs.",
    "background": {
      "service_worker": "background.js"
    },
    "permissions": ["tabs"],
    "icons": {
      "48": "icon48.png",
      "128": "icon128.png"
    }
  }