How to install Zen Browser on Arch
You can check available packages here:
https://aur.archlinux.org/packages?O=0&SeB=nd&K=zen-browser&outdated=&SB=p&SO=d&PP=50&submit=Go
Best option is to use zen-browser-bin
package, which is the latest version of Zen Browser.
yay -S zen-browser-bin
In early days there was special package for AVX2 CPUs, but it was removed due to the fact that Zen Browser is now built with AVX2 support by default.
https://www.reddit.com/r/zen_browser/comments/1hnzex9/no_avx2_package_anymore/