Examine source code of All Teh Fangs

{
  "manifest_version": 2,
  "name": "All Teh Fangs",
  "description": "De and Re fangs urls from a webpage to your clipboard",
  "version": "1.0.0",
  "permissions": [
    "contextMenus",
    "tabs",
    "menus",
    "clipboardWrite"
  ],
  "icons": {
    "16": "icon.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}