Examine source code of Unescape as HTML

{
  "manifest_version": 2,
  "name": "Unescape as HTML",
  "version": "0.1.0",
  "description": "Unescape the contents of an editable field as HTML, thus replacing escape sequences (such as π) with Unicode characters (such as π).",
  "author": "Fabio Pesari",
  "icons": {
    "48": "icons/render-as-html.svg",
    "96": "icons/render-as-html.svg"
  },
  "permissions": [
    "activeTab",
    "menus"
  ],
  "background": {
    "scripts": [
      "src/main.js"
    ]
  }
}