Fun fact - the biggest difference comes from this single commit: https://gitlab.gnome.org/GNOME/gtk/-/commit/57e354c297e1703079c2bc6fb51211b24d884ac3
Then the new "ngl" renderer and fixes in the Wayland backend boost the performance even further.
@dos does better graphics performance help gnome web be more usable?
I just found out about the setting.
Before this, I kept trying to use GNOME Web on my laptops, but it was just simply too slow. But now, it's finally acceptable (even if it's not as smooth as Firefox).
I filed a (now closed) bug about it (thinking it was related to Epiphany, perhaps on Intel GPUs or something), but it's an upstream WebKit issue, apparently: https://gitlab.gnome.org/GNOME/epiphany/-/issues/1460
Glad it's enabled in Librem 5!