Brave Browser Dev 

Brave Browser Dev is the unpolished and unfinished early preview for new versions of Brave. You can try it out only if you’re looking for a little extra spice and adventure in your browsing. Dev automatically sends crash-reports when things go wrong.

Brave fights malware and prevents tracking, keeping your information safe and secure. The servers neither see nor store your browsing data – it stays private, on your devices, until you delete it.