`pkg rquery %M` maybe not working with (old) FreeBSD-CURRENT

[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% date ; uname -v
Sun  5 Nov 2017 05:31:28 GMT
FreeBSD 12.0-CURRENT #0 r320869: Mon Jul 10 13:57:55 UTC 2017     root@releng3.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg rquery -r area51 %m firefox
gecko@FreeBSD.org
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg rquery -r area51 %M firefox

[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg rquery -r FreeBSD %m firefox
gecko@FreeBSD.org
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg rquery -r FreeBSD %M firefox

[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg info pkg
pkg-1.10.99.5
Name           : pkg
Version        : 1.10.99.5
Installed on   : Fri Sep 22 09:27:23 2017 BST
Origin         : ports-mgmt/pkg-devel
Architecture   : FreeBSD:12:amd64
Prefix         : /usr/local
Categories     : ports-mgmt
Licenses       : BSD2CLAUSE
Maintainer     : pkg@FreeBSD.org
WWW            : http://wiki.freebsd.org/pkgng
Comment        : Package manager
Shared Libs provided:
        libpkg.so.4
Annotations    :
        repo_type      : binary
        repository     : area51
Flat size      : 34.8MiB
Description    :
Package management tool

WWW: http://wiki.freebsd.org/pkgng
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg info firefox | grep Installed
Installed on   : Sun Nov  5 04:50:20 2017 GMT
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg query %M firefox
Always:
======================================================================

Some features available on other platforms are not implemented:
- Native audio (OSS backend is incomplete, doesn't support WebRTC)
- Encrypted Media Extensions (requires Widevine CDM binary)
- Process sandboxing (requires Capsicum backend)
- Reduced memory usage (requires mozjemalloc)
- Performance profiling (requires GeckoProfiler)
- Gamepad API (requires libusbhid backend)
- WebVR (requires open source runtime)
- U2F Security Keys (requires libusbhid backend)

======================================================================

To select non-default audio backend open about:config page and create
media.cubeb.backend preference. Supported values are: alsa, jack,
pulse, pulse-rust, oss, sndio. Currently used backend can be inspected
on about:support page.

======================================================================

smb:// issues (Gvfs/GIO option):
Network group, machine, and share browsing does not work correctly.

sftp:// (Gvfs/GIO option):
Only sftp access using public key authentication works.  To easily
setup public key authentication to "remote_host":

ssh-keygen
cat ~/.ssh/id_rsa.pub | ssh remote_host "cat >> .ssh/authorized_keys"

The SSH server on remote_host must allow pub key authentication.

======================================================================

Any bug reports should be addressed to the maintainers at:
        gecko@FreeBSD.org
You may also Cc: freebsd-ports@FreeBSD.org. Please do not send
bug reports to any other addresses.

Please include the following information with any bug report:
* Output from 'uname -a'.
* Output from 'ident /usr/ports/www/firefox/Makefile'
* Where/when did the problem occur: configuring, building, or
        running firefox
* How can you reproduce the problem?

Thank you for your help in testing and reporting bugs, and we hope you
enjoy using Firefox.
The Maintainers (gecko@)
======================================================================

[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% date ; uname -v ; pkg rquery %M firefox
Sun  5 Nov 2017 05:37:00 GMT
FreeBSD 12.0-CURRENT #0 r320869: Mon Jul 10 13:57:55 UTC 2017     root@releng3.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC



[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% date ; uname -v ; pkg rquery %M firefox-i18n
Sun  5 Nov 2017 05:37:03 GMT
FreeBSD 12.0-CURRENT #0 r320869: Mon Jul 10 13:57:55 UTC 2017     root@releng3.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC

[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg -vv | grep -A 100 Repositories
Repositories:
  FreeBSD: {
    url             : "pkg+http://pkg.FreeBSD.org/FreeBSD:12:amd64/latest",
    enabled         : yes,
    priority        : 0,
    mirror_type     : "SRV",
    signature_type  : "FINGERPRINTS",
    fingerprints    : "/usr/share/keys/pkg"
  }
  area51: {
    url             : "http://meatwad.mouf.net/rubick/poudriere/packages/head-amd64-kde",
    enabled         : yes,
    priority        : 5
  }
  poudriere: {
    url             : "file:///usr/local/poudriere/data/packages/current-freebsd-ports-kde",
    enabled         : yes,
    priority        : 7,
    mirror_type     : "SRV"
  }
  trueos-base: {
    url             : "http://pkg.cdn.trueos.org/unstable/amd64-base/",
    enabled         : no,
    priority        : 0
  }
  trueos-packages: {
    url             : "http://pkg.cdn.trueos.org/packages/unstable/amd64/",
    enabled         : no,
    priority        : 0
  }
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~%