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The point is that just because you don't want most sites to use these features doesn't mean that no use exists. I just want to make sure I don't get nag notifications begging me to turn it on every time I visit a news site.

Notifications? I need those from my calendar app and chat app.

Badges? Messaging systems I use rarely but which are important.

Visibility? I want resource intensive apps to "sleep" when not in use.

USB? I want an Arduino web ide to be able to communicate with hardware.

Screen lock? I don't want the machine to go into sleep mode when I'm presenting a slide deck.

Key lock? I don't want the browser intercepting keystrokes in my word processor or SSH session.

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