Examine source code of Smart Tab Organizer

{
  "manifest_version": 2,
  "name": "Smart Tab Organizer",
  "version": "1.0",
  "description": "Show only tabs you need, hide the rest.",
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_title": "Smart Tab Organizer",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{077de080-0faa-47d9-ac3c-57679b19a21d}"
    }
  }
}