Regarding unanticipated software updates, this may be slightly off topic, but updates are particularly troublesome with Windows 10. Unfortunately Win10 doesn't permit reviewing updates before downloading them, an option that was available in prior versions. Even though Win10 Pro version users can delay update installation, automatic downloads can't be turned off and occur without prior notification.

While some tools are available to reduce tracking and other MS privacy-invading practices, auto-updating remains a curse that's hard to counter.

Obviously this is not a fault of the web itself, but an example of the ways vendors use the internet in opposition to interests of users. It's unclear how these abusive practices can be curbed, but I'm all for Mozilla and other organizations trying to do something about it.