Rated 4 out of 5 stars

per vik9693 el nov. 14, 2017 ·

I loved this! customization, half/hourly chime!! great for productivity. Unfortunately, not compatible for FF57, which just got installed. That's why 4 star. Will re-evaluate once it is updated; if the developer finds time, of course. Its free, and its upto the creator(s) if they want to continue.