Firefox is not what it once was. It ships with many user-hostile settings enabled by default. For example: telemetry, Pocket integration, sponsored shortcuts on the New Tab page, sponsored suggestions in the search bar.
The knobs to turn off each of the 4 things I just listed are found in 4 different places within the UI.
The knobs to turn off each of the 4 things I just listed are found in 4 different places within the UI.