On Firefox and Edge when I select emails, I only see a thin blue edge on the left side indicating a selection. But when I press the Options button, I see a full blue selection (on the same html element, underneath the popup.) So it makes multi-select/delete hard, etc. I know this is a web software bug, but maybe it needs an update or the roundcube devs need a support ticket opened. I don't think I can help troubleshoot this any further, but I'm just raising a flag. Thank you.