Any guides on this, cant find any. Do i just use the Generic Mirror setting to input the cdn url?
Imnot sure how I figured it out, but with W3, I set General Settings>CDN to Generic Mirror. I wasnt able to make the others work for stackpath.
Then in w3 settings>CDN>Replace site’s hostname with: I added the stackpath url. I chose to host only attachments and checked Add Conicial Header.
Last, lower on the same page, I checked Set Cookie domain to [mydomain]
Yes, it should work. Or, you can try with Breeze or CDN Enabler plugin.