Tab Network Monitor от Jemi

Tab Network Monitor provides a real-time overview of network usage per browser tab directly from a compact popup.

Instantly see which tabs are consuming bandwidth, with live speed (KB/s, MB/s), total transferred data, and request counts. Tabs are automatically sorted by current network usage, making it easy to identify heavy pages such as video streams or downloads.

Each tab includes a small live graph showing recent network activity, giving you a quick visual understanding of spikes and trends over time.