Such invisible third-party page requests are actually quite common on the web (Narayanan and Zevenbergen 2015), but they rarely involve explicit attempts to measure censorship.
Esou onsichtbar drëtt-Party Säit Demandë sinn eigentlech relativ heefeg op de web (Narayanan and Zevenbergen 2015) , mee se selten ausdrécklechen Versich Debate Zensur ze moossen.