Examine source code of Free GitHub

{
  "manifest_version": 2,
  "name": "FreeGitHub",
  "version": "1.1",
  "homepage_url": "https://github.com/arsalanses/freegithub",
  "description": "Remove warning on top of GitHub.com",
  "icons": {
    "48": "icons/github-48.png",
    "96": "icons/github-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.github.com/*"
      ],
      "js": [
        "omit.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/toolbar-16.png",
      "32": "icons/toolbar-32.png"
    },
    "default_title": "Free GitHub"
  }
}