Fedora Linux is a Linux distribution developed by Fedora Project which is sponsored primarily by Red Hat (an IBM subdiary), with additional sponsors from other companies and organizations. Fedora contains software distributed under various open source licenses and aims to be on the leading edge of open source technologies. Fedora is the upstream source for many distributions, like Rocky Linux and Red Hat Enterprise Linux.
Firefox in Fedora uses Google which makes it not that trade-free. Of course one can change the search engine afterwards, but a truly trade-free operating system would come with a trade-free search engine by default. Therefore 3/5 blocks.