Brave moved away from that to Muon[1], which (IIRC) was originally very close to Electron, but now[2] actually is just a minorly-patched version of upstream Chromium.

They've since moved from Muon to Chromium for the browser chrome[3].

[1]: https://github.com/brave/muon/blob/master/README.md [2]: https://github.com/brave/muon/blob/master/docs/tutorial/movi...

[3]: https://brave.com/development-plans-for-upcoming-release/