What is the situation on tracking pixels?

Websites use 1x1 „tracking pixels” that track activity across the web. This isn’t new, and has been known for a while. What is currently the best way to block them? Is having Firefox with uBlock Origin enough? Or are other measures required?

Generally yes, although marketing emails can also have embedded web beacons, so I suggest dealing with them in a similar manner if your email client and/or provider supports it.