Examine source code of Pin for GitHub

{
  "manifest_version": 2,
  "name": "Pin for GitHub",
  "version": "1.2",
  "description": "Pin repositories on GitHub for later without having to star them",
  "homepage_url": "https://github.com/vantezzen/pinforgithub",
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "*://github.com/*",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "pinned-list.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pinforgithub@vantezzen.io"
    }
  }
}