Having basically the same experience. Brave Browser Helper immediately and continuously not quite pegs but remains above 95% usually 98-99%. Google Chrome is updated as is Brave and no similar issue. Only have two extensions both of which I’ve disabled. The problem started in the last few weeks at some point, before that things were just fine, Brave probably used less CPU than Chrome and certainly less than Firefox despite it being my preferred/primary browser.
||Dual-Core Intel Core i7
|Number of Processors:
|Total Number of Cores:
|L2 Cache (per Core):
|Boot ROM Version:
|SMC Version (system):
Version 1.4.95 Chromium: 80.0.3987.122 (Official Build) (64-bit)
Has now persisted through at least one minor browser update maybe several.
Doesn’t make the system unusable but drains battery quickly when unplugged, definitely makes it run hot & the fan then almost constantly on, accounting for the battery drain presumably.
Reddit and other threads indicate this isn’t a totally isolated experience it seems