
In June 2019, Brave started testing a new ad-blocking rule-matching algorithm implemented in Rust, replacing the previous C++ one. Brave Software released the final Muon-based version with the intention that it would stop working and instructed users to update as its end-of-life approached. Nevertheless, Brave developers moved to Chromium, citing a need to ease their maintenance burden. Until December 2018, Brave ran on a fork of Electron called Muon, which they marketed as a "more secure fork". Later that month, Brave added support for Tor in its desktop browser's private-browsing mode.

Brave announced that expanded trials would follow. This version of Brave came preloaded with approximately 250 ads and sent a detailed log of the user's browsing activity to Brave for the short-term purpose of testing this functionality. In June 2018, Brave released a pay-to-surf test-version of the browser.

On 20 January 2016, Brave Software launched the first version of Brave with ad-blocking capabilities and announced plans for a privacy-respecting ad platform. On, CEO Brendan Eich and CTO Brian Bondy founded Brave Software.
