Contribute one
browser profile.
This page is recording how your pointer moves across it, starting from the moment it loaded. That buffer stays in this tab. Pressing start measures the browser and uploads both together — nothing is sent before that.
What gets recorded
- Pointer movement — every trusted move, press and release anywhere on this page, from load until you press start: time since load, position in the viewport, pointer type, buttons and pressure. The most recent 2000 samples are kept.
- Browser and device — user agent, platform, languages, CPU cores, memory class, touch support and User-Agent client hints.
- Display — screen and window geometry, pixel ratio, orientation, timezone offsets and CSS media-query results.
- Rendering — WebGL and WebGPU adapter details, plus SHA-256 hashes of a canvas drawing and an offline audio render. The images and audio themselves are discarded.
- Capabilities — which of 40 common fonts resolve, codec support, plugin and MIME metadata, storage quota, battery status, and the number of media devices without their labels.
- Request metadata — the headers your browser sends with the upload, including your IP address, as with any web request.
Never recorded: keystrokes or typed text beyond the optional device name, clipboard, browsing history, cookies, files, location, camera or microphone streams, media-device labels, or anything at all on any other page. Close this tab without pressing start and the buffer goes with it.
Takes a couple of seconds. You get a deletion key afterwards, and a picture of exactly what was captured.
Working
Measuring this browser.
Starting local probes. Nothing has been sent.
Record stored
Thank you — that's everything.
Keep the deletion key if you might want this record removed later — it is shown once and is the only way to delete the record without the operator.
Not uploaded