A lightweight Manifest V3 Chrome extension popup for system metrics. The first version renders only when the toolbar popup opens and uses mock data by default outside Chrome.
corepack enable
corepack prepare pnpm@11.9.0 --activate
pnpm installpnpm build
pnpm testOpen src/popup.html directly for quick mock-data UI checks, or load the built dist folder in Chrome for extension APIs.
pnpm buildThe build output is written to dist.
- Open
chrome://extensions. - Enable Developer mode.
- Click Load unpacked.
- Select the
distfolder. - Click the System Monitor toolbar icon.
Chrome extension APIs expose CPU, memory, storage, and display metadata with limited detail. They do not expose reliable raw network throughput, CPU temperature, fan speed, SSD temperature, or SSD read/write throughput. Those values are shown as unsupported or N/A unless a future version adds a real Native Messaging host or local companion agent.
This first version intentionally does not use Native Messaging and does not inject a floating overlay into webpages.