From Start to Download Five steps, and the upload counter never moves Any server Uploaded: 0 bytes watching the whole time STEP 1 Include microphone STEP 2 Start recording Choose what to share the browser's own dialog, not this page's Tab Window Entire screen Also share audio Window Share STEP 3 REC 00:00 00:07 00:12 STEP 4 Stop Your recording 3.1 MB 00:12 WebM STEP 5 Download .webm screen-recording.webm saved on your device Still 0 bytes Nothing left your device The browser does the recording.This page only presses the buttons. Animation: the five steps of a browser recording, from the share dialog to the saved .webm, beside an upload counter that stays at zero bytes