[wangweij]

While I am able to switch to another browser (I already did a long time ago), I don't believe I can avoid visiting sites "that show ads from Google". How much can Google collect from those sites?

[forgotpwtomain]

I highly recommend:

https://github.com/gorhill/uBlock

https://github.com/gorhill/umatrix

[bad_user]

There's also Privacy Badger by EFF: https://www.eff.org/privacybadger

[SimeVidas]

Firefox has a “tracking protection” setting which blocks these types of third party trackers.

[Sylos]

Which is default-enabled in Private Browsing, and you can enable it for normal browsing as well by setting "privacy.trackingprotection.enabled" in about:config to true. A GUI-toggle for this should make it into Stable in the next few releases...

[JoshTriplett]

> While I am able to switch to another browser (I already did a long time ago), I don't believe I can avoid visiting sites "that show ads from Google".

You can block those ads, and the scripts that serve them and collect data.

[lensi]

The simple setting, most seem to be overlooking, is don't allow third party cookies. Voila.