I gave it a solid eight days’ trial, but I’m closing Arc Browser and moving back to Vivaldi as my default web browser. I really love the UI of Arc, in particular the way its Spaces help me organise my browsing, but for some reason it uses over 100% CPU constantly whenever it’s visible on the screen. I’m sick of hearing my MBA’s fans blasting at full pelt when all I’m doing is basic web browsing on lightweight sites! I’d happily revisit it if I heard a future update fixed the performance issues, though. Apart from that it is really nice to use.