Chief TWiT 
Despite the many minutes I had to spend setting it up, I really like the new Vivaldi. It's now my default browser on Mac and Linux.
Cuz @leo I now feel too deep into Firefox to switch but I did give Vivaldi a shot a year ago or so. What I'd really love is a way to share bookmarks between browser families
@cousinofjah xBrowserSync does everything but Safari: https://www.xbrowsersync.org