I've been giving Brave a shot due to their recent addition of first-class support for IPFS, and the numerous positive HN comments. It's... So much faster. However, it does a poor job of blocking advertisements and trackers. I'll be going back to Firefox for that reason, I can suffer the slowness.
One common response regarding performance woes on Firefox is that common addons, particularly uBlock, process a large amount of data through complex rules during page load. What I haven't heard is any plans on the part of Mozilla to support that level of ad-blocking and privacy protection at the product level, rather than the extension level, which may provide much needed performance enhancements.
uBlock Origin, HTTPS Everwhere, Decentraleyes, Privacy Badger, au-revoir-utm et al should be native features at this point.