Examine source code of Github Repo Status

{
  "description": "Provide activity overview for GitHub repositories",
  "manifest_version": 2,
  "name": "github-repo-status",
  "version": "1.0",
  "homepage_url": "https://github.com/pierluigi/github-repo-status-webextension",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.github.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "page_action": {
    "default_icon": "icons/unknown.svg",
    "browser_style": true
  },
  "permissions": [
    "activeTab",
    "tabs"
  ]
}