If you want to run the worker for a long time, you must configure your browser to prevent browser freeze and you can also perform other activities in the same browser while the worker is running.

Please follow the instructions:

1. Please copy and paste about:config in your URL bar > Acept the Risk and Continue.
2. Search for the widget.windows.window_occlusion_tracking.enabled
3. Change the value from true to false
4. Restart your browser

Once your browser is configured, you will no longer get violations about invisible windows, this does not apply if you click minimize windows.