Installing Chromium Browser for OpenBSD 6
The Unix Tutorial shows you Step-by-Step How to Install Google Chromium Browser for OpenBSD 6.x Unix Desktop.
And Chromium for OpenBSD 6 is Google’s Open-Source Web Browser Project that supplies the Vast Majority of Code for the Google Chrome Browser.
Finally, OpenBSD is well known for its Security Features:
Security-related APIs & Warning when Unsafe string manipulation Functions
Memory Protection
Cryptography and randomization

Login into OpenBSD Shell.
How to Set the Packages Repository Mirror.
OpenBSD Find Packages RepositoryInstalling the Chromium Browser.
sudo su
If Got “User is Not in Sudoers file” then see: How to Enable sudo
pkg_add -v chromium