Firefox implements a quota system that restricts how many notifications may be sent "without user interaction". This is to reduce the likelihood that one could

Firefox implements a quota system that restricts how many notifications may be sent "without user interaction". This is to reduce the likelihood that one could use this effectively for background tracking and to ensure you won't be swarmed with a gazillion of them if an application server has some bugs on sending notifications. Bugzilla ticket: https://bugzilla.mozilla.org/show_bug.cgi?id=1153504 https://bugzilla.mozilla.org/show_bug.cgi?id=1153504