Examine source code of PostCraftAI

{
  "manifest_version": 3,
  "name": "PostCraftAI",
  "description": "Leverage the power of AI for LinkedIn and Twitter (soon).",
  "version": "1.0.5",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.linkedin.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "extension.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "modal.html",
        "extension.css"
      ],
      "matches": [
        "https://www.linkedin.com/*"
      ]
    }
  ],
  "action": {
    "default_popup": "postcraftai.html",
    "default_icon": "creative.png"
  },
  "icons": {
    "16": "creative.png",
    "32": "creative.png",
    "48": "creative.png",
    "128": "creative.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "postcraftai@yourdomain.com",
      "strict_min_version": "57.0"
    }
  }
}