Why Chromium is default web browser?

I cannot get the default Chromium browser to run on Debian 9.2 or 9.5. I have better luck using NetSurf. Why is Chromium the default web browser for BBB?

Does NetSurf support javascript?

Regards,

NetSurf does not fully support JavaScript at this moment. The reason I ask is because I have no luck turning on Chromium. I wonder if this only happens to me.

On my X15 kernel 4.14… image Chromium worked on initial install…after apt update and apt upgrade Chromium failed…
Am running on 32GB SD …I believe my eMMC has a working Chromium

Am using FireFox for browser