Older Dahua devices use proprietary video streaming protocols (like Port 3000 or 3001) that modern HTML5 browsers no longer support. The NaCl plugin forces the browser to run native code to decode video streams, display live view, and control PTZ (Pan-Tilt-Zoom) functions.
: Recent Dahua firmware updates (Web 3.0 or higher) support HTML5 , which allows for "plugin-free" viewing in Chrome and Edge, removing the need for NACL entirely. Recommended Tools for Better Management nacl web plugin dahua download better