Examine source code of GitHoard - Quick Clone

{
  "manifest_version": 2,
  "name": "GitHoard - Quick Clone",
  "version": "0.1.3",
  "description": "Show GitHoard clone button on websites with links to Git repositories",
  "homepage_url": "https://github.com/jojobyte/githoard-firefox",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "permissions": [
    "bookmarks",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/38-bizaro.png",
    "default_title": "GitHoard"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "check-git.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "icons/19.png",
    "icons/19-bizaro.png",
    "icons/24.png",
    "icons/38.png",
    "icons/38-bizaro.png",
    "icons/48.png",
    "icons/96.png"
  ]
}