Firefox (well, librewolf, but forks are a matter of personal preference).
Chrome (Ungoogled chromium) is used as a fallback for the occasional site that doesn’t work with my restrictive FF configuration.
Both have uBlock, though they’re configured differently to suit their individual purposes.
Arch, because I use niche software and the AUR doesn’t always get along with Manjaro very well (ungoogled-chromium-bin is the worst offender). Switched to arch, configured it identically to my manjaro install, and all has been well.