Examine source code of Smart Github Merge

{
  "manifest_version": 2,
  "name": "Smart Github Merge",
  "version": "1.4",
  "content_scripts": [
    {
      "matches": [
        "*://*.github.com/*"
      ],
      "js": [
        "smart_merge_config.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "*://*.github.com/*"
  ]
}