Examine source code of Spaget

{
  "manifest_version": 2,
  "name": "Spaget",
  "version": "1.1",
  "description": "Straighten out your spaghetti tabs with this simple popup.",
  "icons": {
    "48": "icons/spaget-48.jpg"
  },
  "browser_action": {
    "default_icon": "icons/spaget-48.jpg",
    "default_title": "Spaget",
    "default_popup": "ui.html"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "sessions"
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Space",
        "mac": "Ctrl+Shift+Space"
      },
      "description": "Execute this browser action"
    }
  }
}