Earlier quoted context omitted.
but the damage of notifications is almost zero compared to keylogger IMHO
Depends on what you allow and what your level of sophistication is. My mother recently had "There are antivirus notifications taking over half the screen, do I need to click on them and renew Norton?" She'd been somewhere and done something that had allowed an unscrupulous site to flood her with alerts directing her to give payment information to a scam site pretending to be antivirus renewal. When I finally got over…
It's a symptom of the whole "we converted our document platform into an application platform" debacle that typifies the modern web.
Notifications make no sense for the majority of websites, but if you use, say, a web-based email client, then you probably do want them.