Bestie Brave is literally just Chromium again. Not to mention the fact that their CEO is someone who got ousted from Firefox for being a tremendous bigot. It's not a better alternative to Chrome, it's just the same thing again. It you must use a chromium browser, use ungoogled.
I tried it but didn't care to find out if there was a way to stop it from deleting all my tabs and logins, and I'm not relogging into everything just because I needed to close my browser.
You can set exceptions to the cookie deletion in the security settings. I personally have everything I use frequently (invidious and stuff) to keep the login cookies.
Or you can just completely disable that feature.
I think the vanilla Brave Settings are better than Vanilla Firefox. Though something like Firefox with a custom user.js or Librewolf is a lot better than Brave