I’m thinking about giving Orion another try after discovering focus mode and realizing my liking for vertical tabs (Safari’s compact mode isn’t great for multiple tabs).

There’s also OmniWeb, which apparently isn’t actively developed, but still receives test builds

https://omnistaging.omnigroup.com/omniweb/?pk_vid=f30b228392...

Pale Moon is back on MacOS

https://www.palemoon.org/download.shtml

You can try Qutebrowser

https://qutebrowser.org/

Or why not go totally bleeding edge and run the Servo test builds

https://servo.org/download/