I use firefox beta and noticed that firefox always closes exactly when a new hour hits. The moment it hits say exactly 4:00, 5:00, 6:00, or so on for every hour of the day, the app crashes. I also tried this on the standard firefox and the same thing happens. I even decided to alter my device time in settings and set the time to 11.59 only to have the app crash the moment it turns 12. This is the same for any other time of day I set. I tried changing battery optimization and storage restrictions/optimization and nothing seems to work.