Examine source code of Quick add issue to GitHub

{
  "manifest_version": 2,
  "name": "Quick add issue to GitHub",
  "description": "Open source browser extension/addon for adding issues to Github via a browser button.",
  "version": "1.2resigned1",
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "48": "images/button-48.png",
      "96": "images/button-96.png"
    },
    "default_popup": "popup/app.html"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cb687b9e-ab1b-4328-9ec6-4150cab28f5f}"
    }
  }
}