It's so much worse than punch the monkey ads though. For example, W3C Service Workers lets every news website you've ever visited install a daemon on your compu

It's so much worse than punch the monkey ads though. For example, W3C Service Workers lets every news website you've ever visited install a daemon on your computer without your consent. chrome://serviceworker-internals/ That can happen either by you choosing to go to the website, possibly by prowling the HN "New" page and bouncing, or possibly some other website loading Russia Today in an iframe, so now you've got Russia Today's service worker skulking in the background for all time. Service Workers MiTM your HTTP requests based on prefixes and they phone home every day. They're the reason sites like Facebook can show you notifications even though you don't even have a Facebook tab open. They've got a kill switch over your data where for example if a game author uses service workers to build a "local" game then they can remotely wipe your save data. Worst part is browsers don't provide us the freedom to turn the things off. I'm not even sure if extensions are allowed to block them.