Examine source code of Github One-Click Commit

{
  "manifest_version": 2,
  "name": "Github One-Click Commit",
  "description": "Commit custom mesages with a single click on Github! Silly idea from @HackerNewsOnion",
  "version": "1.3resigned1",
  "icons": {
    "32": "icon32.png",
    "200": "icon200.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*"
      ],
      "js": [
        "index.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{542595ef-aa8e-4135-ac66-f251f8d7917c}"
    }
  }
}