Examine source code of Repo Hub

{
  "short_name": "RepoHub",
  "name": "Repo Hub - Github repository tracker",
  "icons": {
    "16": "source-code.png",
    "48": "source-code.png",
    "128": "source-code.png"
  },
  "permissions": [
    "storage"
  ],
  "manifest_version": 2,
  "version": "0.0.1",
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Repo Hub"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b4e2ae98-ff55-42c8-aaab-669af8f9f78a}"
    }
  }
}