Examine source code of Duolingo Text Editor

{
  "manifest_version": 2,
  "name": "Duolingo Text Editor",
  "version": "0.2.2",
  "description": "Simplifies the formatting of comments and posts. Provides a preview.",
  "content_scripts": [
    {
      "matches": [
        "http://forum.duolingo.com/*",
        "https://forum.duolingo.com/*"
      ],
      "css": [
        "css/font-awesome.min.css",
        "dist/main.css"
      ],
      "js": [
        "dist/main.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "fonts/FontAwesome.otf",
    "fonts/fontawesome-webfont.eot",
    "fonts/fontawesome-webfont.svg",
    "fonts/fontawesome-webfont.ttf",
    "fonts/fontawesome-webfont.woff",
    "fonts/fontawesome-webfont.woff2"
  ],
  "icons": {
    "16": "icons/icon_16.png",
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png",
    "256": "icons/icon_256.png"
  }
}