Keep your run safe.
The current web edition is device-local, so the fastest recovery tool is your exported save.
Back up progress
Open Player Account from the main menu, export a save backup, and keep that file somewhere safe. Import it from the same screen to restore supported progress and entitlements.
Audio
Browsers may wait for a click or key press before starting music. Open Audio Mix to confirm music volume and mute settings, then interact with the menu once to begin playback.
Performance and accessibility
Reduce motion, increase contrast, enlarge interface text, and enable directional color cues from Player Account. If a run becomes unresponsive, export a backup before refreshing whenever the menu remains open.