Examine source code of Sphinx

{
  "manifest_version": 2,
  "name": "Sphinx",
  "version": "1.0",
  "description": "Addon for adding links to the Sphinx link directory.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "browser_style": true
  },
  "permissions": [
    "webRequest",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f6e134fd-d314-4044-8468-f59351f1fc1c}"
    }
  }
}