Examine source code of Shopeasify

{
  "manifest_version": 2,
  "name": "Shopeasify",
  "version": "1.0",
  "description": "Links to all major online stores.",
  "icons": {
    "128": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Shopeasify"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a1758235-ab9d-49bb-8bf6-8dd2b20180d9}"
    }
  }
}