Your files stay on your device
What this browser can do
Presence probes across media, platform, connectivity, graphics, and storage. Each row separates "the API exists" from "permission or configuration would let it work", because those are different facts.
Probing after hydration. Presence checks only; nothing on this page ever asks for a permission.
- Presence is measured, permissions are only QUERIED: the page never calls getUserMedia or requestPermission, so no prompt ever appears from this visit.
- "Present, permission not granted yet" and "present, but permission is denied" are distinct rows: the first needs your yes, the second needs a browser-settings change.
- Where the Permissions API itself is missing (Safari, Firefox for several names), the row says the state is not queryable. That is a fact about the browser, not a detection failure.
- Rows like WebGPU and SharedArrayBuffer carry their second gate on the face: an API can exist and still hand you no adapter / no threads depending on drivers and this page's isolation headers.
Paste, drop, or type to begin. Everything stays on this device.