Recently, tons of website ask you for the permission to display browser notifications. 99% of the time, you will not want these. In fact, all the notifications increase stress, so you should try to get rid of them for your own productivity. Eliminate distractions.

I find even the prompt for these notifications very annoying. With Chrome/Chromium it is even worse than with Firefox.

In Chrome, you can disable the functionality by going to the location chrome://settings/content/notifications and toggling the switch (the label will turn to “blocked”, from “ask”).

In Firefox, go to about:config, and toggle dom.webnotifications.enabled is supposed to help, but does not disable the prompts here. You need to even disable dom.push.enabled completely. That may break some services that you want, but I have not yet noticed anything.