[therealmarv]

Security (not privacy): Firefox has shown in Pwn2Own contests and in security circles that it is not as secure as Chrome. Mainly because of overall security architecture and sandboxing techniques involved (remember the Chrome comic, I think even current Firefox has not implemented all security sandboxing which Chrome had from day 1). Firefox is trying to catch up but is overall behind. So there you have your technical disadvantage. I feel personally saver to visit unknown sites with a current Chrome based browser than with Firefox.

Also if you compare from a fingerprinting side of view then Brave is better than Firefox+uBlock (and all privacy lists involved). You can compare that easily between your Firefox and Brave here: https://coveryourtracks.eff.org/

For me personally I also don't want to miss Chromecast capabilities (it's a nice system and unfortunately there is no good alternative) in my mobile browser.