Examine source code of GitHub Wiki Search

{
  "manifest_version": 2,
  "name": "GitHub Wiki Search",
  "version": "1.0.2",
  "description": "Simple search box for GitHub wikis.",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}