firefox: fix arrow keys in js terminals (Proxmox/ESXi for example)

Hi,

When using firefox to connect to a proxmox hypervisor or other kind of
application that provide a terminal emulator withing the browser, one
may observe that the arrow keys don't work propoerly under OpenBSD.

This has been debugged by David Brownlee and "RVP" under NetBSD
(see the thread at
https://marc.infœ?l=netbsd-current-users&m=176721894101063&w=2)

Below is an adaptation (with the help of landry@) of the patch they
came up with for NetBSD :

I do agree with them that in the long term wscons should be switched
to provide evdev compatible keycodes. But in the mean time, this makes
the arrows work the console under Proxmox/ESXi.

ok ?

Index: Makefile
===================================================================
RCS file: /local/cvs/ports/www/mozilla-firefox/Makefile,v
diff -u -p -u -r1.673 Makefile
--- Makefile 24 Feb 2026 13:58:51 -0000 1.673
+++ Makefile 1 Mar 2026 19:34:02 -0000
@@ -9,6 +9,8 @@ MOZILLA_PROJECT = firefox
MOZILLA_CODENAME = browser
MOZILLA_PROFDATA_TASKID = djIMt7uyQSee2RWDha6PvA

+REVISION = 0
+
WRKDIST = ${WRKDIR}/${MOZILLA_DIST}-${MOZILLA_DIST_VERSION:C/b[0-9]*//}
HOMEPAGE = https://www.mozilla.org/firefox/
SO_VERSION = 160.0
Index: patches/patch-widget_NativeKeyToDOMCodeName_h
===================================================================
RCS file: patches/patch-widget_NativeKeyToDOMCodeName_h
diff -N patches/patch-widget_NativeKeyToDOMCodeName_h
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ patches/patch-widget_NativeKeyToDOMCodeName_h 1 Mar 2026 19:34:02 -0000
@@ -0,0 +1,72 @@
+Index: widget/NativeKeyToDOMCodeName.inc
+--- widget/NativeKeyToDOMCodeName.h.orig
++++ widget/NativeKeyToDOMCodeName.h
+@@ -379,7 +379,9 @@ CODE_MAP_ANDROID(Tab, 0x000F)
+
+ // IME keys
+ CODE_MAP_WIN(Convert, 0x0079)
++#if ! defined(__OpenBSD__)
+ CODE_MAP_X11(Convert, 0x0064)
++