Over a recent week of Web surfing, I peered under the hood of Google Chrome and found it brought along a few thousand friends. Shopping, news and even government sites quietly tagged my browser to let ad and data companies ride shotgun while I clicked around the Web.

This was made possible by the Web’s biggest snoop of all: Google. Seen from the inside, its Chrome browser looks a lot like surveillance software.

Lately I’ve been investigating the secret life of my data, running experiments to see what technology really gets up to under the cover of privacy policies that nobody reads. It turns out, having the world’s biggest advertising company make the most popular Web browser was about as smart as letting kids run a candy shop.

It made me decide to ditch Chrome for a new version of nonprofit Mozilla’s Firefox, which has default privacy protections. Switching involved less inconvenience than you might imagine.