Examine source code of Enhanced Glitch

{
  "manifest_version": 2,
  "name": "Enhanced Glitch",
  "description": "Enhances the Glitch.com editor by adding missing features.",
  "version": "0.0.2.0",
  "content_scripts": [
    {
      "matches": [
        "https://glitch.com/edit/*"
      ],
      "js": [
        "inject.js"
      ],
      "css": [
        "codeHinting.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "js-beautify_1.10.1_beautify.js",
    "js-beautify_1.10.1_beautify-css.js",
    "js-beautify_1.10.1_beautify-html.js",
    "content.js"
  ],
  "browser_action": {
    "default_icon": {
      "16": "16.png",
      "32": "32.png"
    },
    "default_popup": "default_popup.html"
  },
  "icons": {
    "16": "16.png",
    "32": "32.png",
    "48": "48.png",
    "128": "128.png"
  }
}