Depend on your xfce theme you could get one the look like on Firefox Themes.Ok... what's the secret to get Firefox to honor the theme setting in xfce? All other apps/windows reflect the theme change instantly but Firefox does not even with a reboot.
Even Thunderbird works fine.
FreeBSD 13.2-RELEASE-p3
Xfce 4.18
I would be content just to have Firefox's window manager theme match the rest of the OS. Surely this is handled in the OS somewhere. Firefox's "themes" are more the internal content of the window UI and I'm ok with Firefox as-in in that regard.Depend on your xfce theme you could get one the look like on Firefox Themes.
You can also customize your FF with CSS, there is a lot of tutorials on youtube about it.
See attached.Could you show some example screen.
Correct.Do you still see the title bar in Firefox? but it doesn't match Xfwm?
Correct.Did you apply the theme to the window manager (not Appearance)?
You are not seeing the title bar of the "Mozilla Firefox" window. Turn it on and see if it makes a difference.