Very nice to see the AGP drivers in one place.I am currently running 13,4 on my 3850ago on a compaq w6000 dual xeon 3ghz MP with 2gb rambus because i foune them to display 720p videon better on youtube on firefox 115 esr.The 1080p content is very slow.I guess VP9 hardware accel is not working on 3850AGP.So does anyone else have a different suggetion on rev of the driver for youtube usage?

None. It's pointless to try watching youtube online on such system. If you really want, you can download videos locally with yt-dlp.

Somehow , I like watching necroware on such a machine.