[beefee]

Here's the telemetry documentation: https://github.com/brave/brave-browser/wiki/P3A

So it's sending some amount of telemetry, but it's not so bad compared to mainstream browsers. A more detailed comparison is available in this report linked by another commenter: https://www.scss.tcd.ie/Doug.Leith/pubs/browser_privacy.pdf

[jonathansampson]

See also https://brave.com/p3a. The implementation details of P3A are really neat