Examine source code of SySearch

{
  "name": "SySearch",
  "description": "Search inside multiple MediaWiki instances",
  "version": "0.7.1",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "*://*/*"
  ],
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "SySearch",
    "default_icon": "images/sysearch_48.png"
  },
  "icons": {
    "48": "images/sysearch_48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7b2edbb3-8174-4eff-bba2-98af89042405}"
    }
  }
}