So far there are CEF1 and CEF3 - https://en.wikipedia.org/wiki/Chromium_Embedded_Framework#Ov... CEF1 is single process - no longer supported. CEF3 is multi-process - current.

CEF3 still allows single process, but it is only advisable for testing/debugging only. Multi process is recommended for optimal performance and likely some functions may not work well without it. My experience is for simpler apps, single process can still be used.

Chromely is fully configurable and allows single process usage. Please see configuration wiki page at : https://github.com/mattkol/Chromely/wiki/Configuration