Examine source code of Svelte Detector

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Svelte Detector",
  "short_name": "svelte-detector",
  "description": "A quick and easy way to see if a website is using Svelte.",
  "author": "alb",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "browser-polyfill.js",
        "content-script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "images/not-svelte.png"
  },
  "icons": {
    "128": "images/svelte.png"
  }
}