Git Git Hooray

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Git Git Hooray",
  "version": "1.1.0",
  "description": "Celebrate first time contributors on GitHub",
  "homepage_url": "https://github.com/paulmolluzzo/git-git-hooray",
  "manifest_version": 2,
  "minimum_chrome_version": "49",
  "permissions": [
    "https://github.com/*"
  ],
  "icons": {
    "128": "icon.png"
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "https://github.com/*"
      ],
      "css": [
        "content.css"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}