Examine source code of Hide Reddit Sidebar

{
  "manifest_version": 2,
  "name": "Hide Reddit Sidebar",
  "version": "1.0",
  "description": "Hide the sidebar on reddit.com",
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "48": "icons/sidebar-48.png"
  },
  "browser_action": {
    "default_icon": "icons/sidebar-48.png",
    "default_title": "Hide Reddit Sidebar"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*"
      ],
      "js": [
        "background.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{82bda0bf-ab7d-4c2d-8e6a-5e9bbfb9070d}"
    }
  }
}