Please stop using the Chromium engine and go back to the engine in use in Muon.
Brave should not be Yet Another Chrome Clone. It will not succeed by using Chromium, because there will be no benefit to using it over Chrome. Nothing Brave can offer while using Chromium is anything that Chrome or Firefox 60.x cannot do with plugins. But what Brave was while on Muon was unique and powerful. Giving up and becoming Yet Another Chrome Clone will mean the death of the Brave browser.
Please reconsider the horrible, horrible mistake of using Chromium and go back to the old engine.