Firefox implements a quota system that restricts how many notifications may be sent &quot;without user interaction&quot;. This is to reduce the likelihood that one could use this effectively for background tracking and to ensure you won&#x27;t be swarmed with a gazillion of them if an application server has some bugs on sending notifications.<p>Bugzilla ticket: <a href="https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1153504" rel="nofollow">https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1153504</a>