Examine source code of Sensurf: Haptic feedback for the web

{
  "manifest_version": 2,
  "name": "Sensurf: Haptic feedback for the web",
  "version": "1.0.6",
  "description": "Haptic feedback on hover and click for Logitech MX Master 4™ - work faster, reduce fatigue, and stay in flow",
  "permissions": [
    "storage",
    "http://localhost:8765/*",
    "https://vxexiegwwebbgnkwpbkn.supabase.co/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "haptic-client.js",
        "content-script.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Sensurf Settings",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sensurf@sensurf.app",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}