That works only with JavaScript active which uMatrix blocks for 3rd party. The sites one visits mainly are not known for 1st party fingerprinting (that's mainly done by the ad networks). The extra paranoids (like me) can also block JS for certain 1st party sites.
I use uMatrix only experimentally (I rely on NoScript) but it offers a fascinating flexibility of control if one is in the mood. As well, NoScript is near useless when doing stuff with AWS where uMatrix offers the right flexibility (allow from site Y, but only when fetched from site X).
I use uMatrix only experimentally (I rely on NoScript) but it offers a fascinating flexibility of control if one is in the mood. As well, NoScript is near useless when doing stuff with AWS where uMatrix offers the right flexibility (allow from site Y, but only when fetched from site X).