Rebrowser doesn't "call home", transmit tracking metadata or perform A/B testing on users. It's thus an excellent choice for NGOs and public sector installations requiring safeguards.
We've implemented mitigations for dozens of threat models including practical and theoretical side channel attacks and timing attacks based on the latest academic and industry research.
Rebrowser has an evergreen update cycle, which means it'll keep getting faster while gaining support for the latest web standards: Your experience will continually improve over time!
As of May/June 2015 the Rebrowser Project is in incubation. We're looking for feedback from backers, organisations and other partners who share our goals: