You can use tools like https://coveryourtracks.eff.org/ and https://fingerprint.com/ to test your browser and get estimate on how unique it is.
Also, just a side note, beware of the Brave browser, especially its “Tor” functionality. I tested Brave before by using fingerprint.com. I first went to the site normally with Brave and then used the Tor incognito function of Brave to visit the site. fingerprint.com identified it as the same identity.
Edit: Using Arkenfox and Librewolf with the same IP also returned the same identity on fingerprint.com. Changing the IP address, for example by using a Socks5 proxy, changes the identity returned on fingerprint.com
Get used to using the Tor browser for day-to-day browsing.