There is a Firefox Focus though: https://apps.apple.com/us/app/firefox-focus-privacy-browser/... I use Firefox Focus almost every day, mainly for "focused" browsing, i.e. one page at a time, no tabs; without tabs and the urge to open links you really get to focus on the current page more. It has some content blockers capable of blocking ads and trackers too, although in my regular browsing I use 1Blockers for configurability (say, disable cookies on news sites).