Examine source code of Audio Highlighter

{
  "author": "Peter Revill",
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "icon.png"
    },
    "default_title": "Audio Highlighter",
    "default_popup": "popup.html",
    "browser_style": true
  },
  "description": "This extension highlights a tab playing music, and allows you to switch to that tab easily.",
  "manifest_version": 2,
  "name": "Audio Highlighter",
  "permissions": [
    "activeTab",
    "tabs",
    "contextMenus"
  ],
  "version": "1.5resigned1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{6dd5a247-524a-4c8a-9020-9e47db04069e}"
    }
  }
}