Examine source code of columnizer

{
  "manifest_version": 2,
  "name": "Multi-Voice Social Weaver",
  "version": "1.0.0",
  "description": "Enhance social media with multiple voice controls for scrolling and interaction",
  "browser_action": {
    "default_popup": "index.html",
    "browser_style": true
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "multi-voice-social-weaver@example.com",
      "strict_min_version": "58.0"
    }
  }
}