The short, honest version.
This site is static HTML served from Cloudflare Pages. No analytics, no tracking pixels, no cookies, no JavaScript beyond a countdown timer that runs entirely in your browser. Web server logs exist at the CDN for abuse mitigation and expire on Cloudflare's standard schedule.
Cryolite contains no telemetry, no experiments, no crash reporter, no geo-IP lookups, and no Mozilla data collection — not toggled off, removed at the source by the GNU IceCat patch set. The updater is compiled out, so the browser never phones home for new versions. Default search is a privacy-respecting engine, and LibreJS blocks non-free JavaScript by default.
What you do in your profile is between you and your disk.
The downloads server serves static files over HTTPS. Standard server logs only.