I would never have imagined installing it for non-technical users, but one was interested in giving it a try and had no problem. They even said they really liked learning how the web worked (uMatrix shows a grid (the matrix) of hosts and functionality, such as CSS, images, scripts, media, etc.). So I gave it to another non-technical user, and they also like it.

Both have been surprised to see the number of domains that contribute to one webpage (most users assume it's all from the domain they typed into the URL field), and how often Facebook, Twitter, Google Analytics, and other tracking domains show up in that matrix.