Examine source code of Claude Content Capture

{
  "manifest_version": 3,
  "name": "Content Capture",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "content-capture@example.com"
    }
  },
  "description": "Captures webpage content for analysis",
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "scripting"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png",
      "96": "icon96.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}