Examine source code of GitHub User Languages

{
  "author": "freyamade",
  "browser_action": {
    "default_icon": "images/github-user-languages.128.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@github-user-languages.github.com"
    }
  },
  "content_scripts": [
    {
      "js": [
        "js/vendor.js",
        "js/content_script.js"
      ],
      "matches": [
        "https://github.com/*"
      ]
    }
  ],
  "description": "See the language usage breakdown of a User or Org right on their GitHub profile page.",
  "icons": {
    "128": "images/github-user-languages.128.png"
  },
  "manifest_version": 2,
  "name": "GitHub User Languages",
  "permissions": [
    "https://api.github.com/",
    "https://raw.githubusercontent.com/ozh/github-colors/master/colors.json",
    "storage"
  ],
  "short_name": "github-user-languages",
  "version": "1.1.0"
}