Examine source code of Poshmark Share OneClick

{
  "manifest_version": 2,
  "name": "Poshmark Share OneClick",
  "version": "1.0.4",
  "description": "It automatically selects all your available listings and shares them to your followers—making sharing effortless and fast.",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://poshmark.com/*",
        "*://www.poshmark.com/*",
        "*://poshmark.ca/*",
        "*://www.poshmark.ca/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0c7cfec9-744d-4016-8898-6f61ca52f0aa}"
    }
  }
}