Examine source code of Closet Helper

{
  "name": "Closet Helper",
  "version": "0.0.5resigned1",
  "description": "A simple tool to simplify the process of selling on Poshmark.",
  "author": "Closet Helper",
  "manifest_version": 2,
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_title": "Closet Helper"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.poshmark.com/my-feed*",
        "*://*.poshmark.com/feed*",
        "*://*.poshmark.com/closet*",
        "*://*.poshmark.com/category*",
        "*://*.poshmark.com/party*",
        "*://*.poshmark.com/brand*",
        "*://*.poshmark.com/user*",
        "*://*.poshmark.com/likes*"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ad7910aa-cd4d-4f1f-b6d2-b60562d91cf9}"
    }
  }
}