Debian (/ˈdɛbiən/), also known as Debian GNU/Linux, is a GNU/Linux distribution composed of free and open-source software, developed by the community-supported Debian Project, which was established by Ian Murdock on August 16, 1993. The first version of Debian (0.01) was released on September 15, 1993, and its first stable version (1.1) was released on June 17, 1996. The Debian Stable branch is the most popular edition for personal computers and servers. Debian is also the basis for many other distributions, most notably Ubuntu.
Debian is an operating system that comes with firefox as the browser and firefox uses google by default. Google collects peoples data and shows them ads, thus it’s not trade-free. Plus, debian has a software center where you can install applications, however I do not know if all of them are trade-free. 3/5 blocks for debian, as it uses google as the search engine by default.