Examine source code of CodeCopy

{
  "manifest_version": 2,
  "name": "CodeCopy",
  "description": "Because copy to clipboard buttons should exist on every code snippet",
  "homepage_url": "https://github.com/zenorocha/codecopy",
  "version": "0.4.1resigned1",
  "applications": {
    "gecko": {
      "id": "codecopy@clipboardjs.com",
      "strict_min_version": "45.0"
    }
  },
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "content_scripts": [
    {
      "css": [
        "styles/main.css"
      ],
      "js": [
        "scripts/main.js"
      ],
      "matches": [
        "https://developer.mozilla.org/*",
        "https://medium.com/*",
        "https://www.npmjs.com/*",
        "https://github.com/*",
        "https://gist.github.com/*",
        "http://stackexchange.com/*",
        "https://stackexchange.com/*",
        "http://*.stackexchange.com/*",
        "https://*.stackexchange.com/*",
        "https://serverfault.com/*",
        "https://superuser.com/*",
        "https://askubuntu.com/*",
        "http://stackoverflow.com/*",
        "https://stackoverflow.com/*"
      ]
    }
  ]
}