Browser Monitor Test Help

Why did fullscreen not open?

The browser refused or could not complete the request. Fullscreen normally needs a direct click or key action, and browser permissions, embedded pages, or device policy can block it. Try the page's fullscreen button again, check the site permission, or continue in the largest available window. MDN documents the user-action and permission requirements in its Fullscreen API reference.

Why is my saved history missing?

History is stored for this site in this browser on this device. It does not follow you to another browser or computer. Private sessions, storage restrictions, and clearing site data can remove it. Open Test History on the original device and export anything important instead of treating browser storage as the only copy.

Does an unfinished defect report save automatically?

No. Saved test history and an unfinished report are separate. The report builder's inputs and selected photos stay in the current page session and disappear on reload. Before leaving, use Download PDF Report or Download Evidence JSON and check the downloaded file. Keep the original camera photos too.

Test History offers CSV export and a PDF report for saved results. Those files give you a separate copy; they do not create an account backup or keep an unfinished report open on another device.

Does browser HDR support mean HDR is active?

That is a capability signal, not proof that this page, a game, or a video is currently reaching the panel as HDR. The CSS dynamic-range feature can match when the browser and output device support a high range, even when that capability is not active. Confirm the operating-system HDR setting, the display's input mode, and the content itself. Use the HDR page for comparison, not peak-brightness or color-volume measurement.

Why does the refresh-rate reading move around?

The page estimates browser animation cadence, so frame scheduling, system load, power mode, variable refresh, and tab visibility can affect the sample. Keep the test visible, stop heavy background work, and compare it with the selected rate in the operating system. A stable browser estimate is still not an external measurement of the panel's scan.

Why does the reaction-time result look high?

Do not read it as monitor input lag. The trial includes your response, the mouse or keyboard, operating-system scheduling, browser event handling, rendering, and the display. Use the reaction-time page to compare the same person and setup after one change. Display-only latency needs a separate measurement method.

Why does a screenshot not show the defect?

That is expected for a physical panel problem. A screenshot captures the image the computer rendered before the panel displayed it. Use a screenshot when the artifact also appears in the captured file; use a camera when the issue is a fixed pixel, edge light, reflection, flicker band, uniformity patch, or viewing-angle change.

Why does the camera photo look more dramatic?

Automatic exposure, focus, shutter behavior, and image processing can exaggerate or hide what you saw. Keep the room condition and camera position consistent, avoid digital zoom when possible, and take both a close photo and a wider context photo. Treat the image as documentation, not a brightness or flicker measurement.