Guided checks
Before and after comparison
Run the same guided procedure twice and compare observations after changing one condition.
How to use this check
Start and stop each step deliberately. Inspect the live data, then continue. A completed step means you observed it, not that the device passed.
What the browser measures
Marks show recorded events in sequence. Empty graphs mean no matching events have been observed.
Reading the result
Record trial A, change one connection or setting, then repeat as trial B. Keep duration, thresholds and actions constant. Differences in counts alone can come from different input, so compare axes and intervals with the procedure in mind.
Why results can differ
A browser observes events exposed by your operating system. One test cannot establish whether a device is faulty. Connection, settings, focus and browser behavior can change the results.