Firefox, or Brave when things don't work on Firefox.
Arc looks interesting from this thread and I've requested an invite. I keep an eye on Safari, especially new privacy features regularly being added and supported by Apple - though I'm aware of their privacy policy generally means they protect your privacy from everyone except Apple.
UPDATE: Opening the app asks for a login, when I enter my email it says not on the Waitlist so I guess they've changed it to require an invite before you can use it.
Boo. I uninstalled it a week after installing it. I just use Tree Style Tabs in firefox now which is about the only thing i like in arc. Lord knows we don’t need another chromium browser trying to reinvent the GUI.