Examine source code of Hashtag Generator

{
  "manifest_version": 2,
  "name": "Hashtag Generator",
  "version": "1.0",
  "browser_action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2e945fc6-745c-46e4-90c1-de20f37dc2d3}"
    }
  }
}