Examine source code of Markdown Editor V2

{
  "manifest_version": 2,
  "name": "Markdown Editor V2",
  "version": "1.3",
  "description": "A simple and powerful Markdown editor inside your browser.",
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/logo_64.png",
    "default_title": "Open Markdown Editor",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "editor.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5bcba220-8eb0-45d8-902f-90c8c409a4c5}"
    }
  }
}