Examine source code of sauce extension

{
  "name": "sauce extension",
  "description": "show the source of a page inside a dev tools panel",
  "manifest_version": 2,
  "version": "0.3",
  "browser_specific_settings": {
    "gecko": {
      "id": "sauce@h43z"
    }
  },
  "devtools_page": "devtools-page.html"
}