Examine source code of SPF Sunscreen Guide

{
  "manifest_version": 2,
  "name": "SPF Sunscreen Guide",
  "version": "1.0",
  "description": "A Firefox add-on that quickly shows what type of suncreen SPF to choose.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2667dae0-0fda-4543-8903-c6c8c2fc6f50}"
    }
  }
}