Examine source code of Bug Report

{
  "name": "Bug Report",
  "version": "1.2",
  "description": "This extension gets the browser details and writes a bug report.",
  "permissions": [
    "tabs",
    "activeTab",
    "<all_urls>"
  ],
  "manifest_version": 2,
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "16": "images/bug_icon16.png",
      "48": "images/bug_icon48.png",
      "128": "images/bug_icon128.png"
    }
  },
  "icons": {
    "16": "images/bug_icon16.png",
    "48": "images/bug_icon48.png",
    "128": "images/bug_icon128.png"
  }
}