Kubuntu 26.04 Beta — Resolute Raccoon | Kubuntu
Seeing Firefox 148 (from Snap Store) raised an eyebrow, because I already have 149.0 (the official Debian package).
I booted the beta from an old, slow USB memory stick. Live, without upgrading. It has Firefox 149
First impressions:
no regression
an existing issue with graphics is not fixed.
There's probably a bug report for the graphics issue. I can't remember where I discussed it, I didn't want to spend too much time. The bug is an annoyance, but my time will be better spent getting a new computer …