There hasn't been a comment or status change to this bug in three years.
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.
You can block ads just by editing your hosts file. There's no need to depend on any browser's particular functionality in order to get rid of them. Nor on extra hardware (Pi-hole), for that matter. I have a cron job download a prefilled copy from a popular github repository [1] daily.