Can not Spoof User-Agent

Trying to login to a banksite with Gnome-web [epiphany] on Wayland or X
Bank site only allows firefox-chrome or ie or OS-X browser
See my thread on bbs.archlinux.org
https://bbs.archlinux.org/viewtopic.php?id=226736
Did some search on this site user-agent and noted
github epiphany-extensions are +5 years old?
 Got midori with builtin extension libstatusbar-features.so
to spoof as linux-firefox also does image/script toggle load usefull
for some sites.
Sadly midori is very much less stable than epiphany.