Earlier quoted context omitted.
Agreed. I hastily installed FF Preview and then immediately uninstalled it when I couldn't find where to install uBlock. They shouldn't have launched, or made an announcement, without some form of adblocking (native or plugin). I understand that it's a testing release, but they stand to lose out on many testers and users. While I am perfectly willing to be a guinea pig and use this as my daily driver, I am passionate…
Did you actually try it on a website with lots of ads? I've been using focus for the last 6 months or so and the tracker blocking also blocks many ads for me. Also there is blockada which blocks ads system wide.
It doesn't block ads. It blocks trackers that sometimes happen to be ads too. But when it comes to ad blocking, it's no better than Chrome.