When I went to FF 57, I needed a replacement for Reminderfox. This product does the job. It has an option to display in list format which is what I prefer. My only quibble I that it doesn't present all of the Google Calendar options when I add an event. I have to press the button that goes to Google calendar. This is a very minor inconvenience. Google Calendar imported the Reminderfox ICS file perfectly. To get Google Calendar to work almost exactly like Reminderfox you do have to change the Google Calendar option for alarms. Keep up the good work. I will be making a donation today.