every single website would have a popup at the top of the page asking you to turn on notifications for that website. that's what makes it so annoying. this is the new malware honestly. tons of browser notifications is what i notice when i access a relative's computer. because they end up clicking yes on most of these websites and then get spammed with notifications through the day.
not sure why you are not noticing this already because firefox has supported this feature for long and practically every single news website does this shit.