libvpx 1.7.0 versus Firefox 56.0.2_9,1 on FreeBSD-CURRENT

[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% waterfox
XPCOMGlueLoad error for file /usr/local/lib/waterfox/libxul.so:
Shared object "libvpx.so.5" not found, required by "libxul.so"
Couldn't load XPCOM.
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% sudo pkg upgrade -f -r poudriere libvpx
Password:
Updating poudriere repository catalogue...
poudriere repository is up to date.
All repositories are up to date.
Checking integrity... done (0 conflicting)
The following 1 package(s) will be affected (of 0 checked):

Installed packages to be UPGRADED:
        libvpx: 1.6.1_2 -> 1.7.0 [poudriere]

Number of packages to be upgraded: 1

Proceed with this action? [y/N]: y
[1/1] Upgrading libvpx from 1.6.1_2 to 1.7.0...
[1/1] Extracting libvpx-1.7.0: 100%
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% firefox
XPCOMGlueLoad error for file /usr/local/lib/firefox/libxul.so:
Shared object "libvpx.so.4" not found, required by "libxul.so"
Couldn't load XPCOM.
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg info firefox | grep -i version
Version        : 56.0.2_9,1
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% date ; uname -v
Wed 31 Jan 2018 09:32:09 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 info firefox
firefox-56.0.2_9,1
Name           : firefox
Version        : 56.0.2_9,1
Installed on   : Mon Nov 13 22:44:52 2017 GMT
Origin         : www/firefox
Architecture   : FreeBSD:12:amd64
Prefix         : /usr/local
Categories     : ipv6 www
Licenses       :
Maintainer     : gecko@FreeBSD.org
WWW            : http://www.mozilla.com/firefox
Comment        : Web browser based on the browser portion of Mozilla
Options        :
        ALSA           : on
        BUNDLED_CAIRO  : on
        CANBERRA       : off
        DBUS           : on
        DEBUG          : off
        DTRACE         : on
        FFMPEG         : on
        GCONF          : off
        INTEGER_SAMPLES: off
        JACK           : on
        LIBPROXY       : off
        OPTIMIZED_CFLAGS: on
        PGO            : off
        PROFILE        : on
        PULSEAUDIO     : on
        SNDIO          : off
        TEST           : off
Shared Libs required:
        libdbus-glib-1.so.2
        libgtk-x11-2.0.so.0
        libXext.so.6
        libpango-1.0.so.0
        libjpeg.so.8
        libpixman-1.so.0
        libsqlite3.so.0
        libcairo.so.2
        libgtk-3.so.0
        libffi.so.6
        libxcb-shm.so.0
        libX11-xcb.so.1
        libfreetype.so.6
        libcairo-gobject.so.2
        libatk-1.0.so.0
        libhunspell-1.6.so.0
        libevent-2.1.so.6
        libvpx.so.4
        libplc4.so
        libXcomposite.so.1
        libxcb.so.1
        libgdk_pixbuf-2.0.so.0
        libgio-2.0.so.0
        libssl3.so
        libXfixes.so.3
        libnss3.so
        libogg.so.0
        libv4l2.so.0
        libgobject-2.0.so.0
        libnssutil3.so
        libplds4.so
        libharfbuzz.so.0
        libstartup-notification-1.so.0
        libX11.so.6
        libdbus-1.so.3
        libXdamage.so.1
        libnspr4.so
        libXt.so.6
        libgraphite2.so.3
        libicuuc.so.60
        libpng16.so.16
        libicui18n.so.60
        libvorbis.so.0
        libglib-2.0.so.0
        libfontconfig.so.1
        libsmime3.so
        libgdk-x11-2.0.so.0
        libgdk-3.so.0
        libXrender.so.1
Annotations    :
        cpe            : cpe:2.3:a:mozilla:firefox:56.0.2:::::freebsd12:x64:9
        no_provide_shlib: yes
        repo_type      : binary
        repository     : FreeBSD
Flat size      : 168MiB
Description    :
Mozilla Firefox is a free and open source web browser descended from the
Mozilla Application Suite. It is small, fast and easy to use, and offers
many advanced features:

 o Popup Blocking
 o Tabbed Browsing
 o Live Bookmarks (ie. RSS)
 o Extensions
 o Themes
 o FastFind
 o Improved Security

WWW: http://www.mozilla.com/firefox
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~% pkg info waterfox
waterfox-56.0.3_4
Name           : waterfox
Version        : 56.0.3_4
Installed on   : Mon Jan 29 23:05:24 2018 GMT
Origin         : www/waterfox
Architecture   : FreeBSD:12:amd64
Prefix         : /usr/local
Categories     : ipv6 www
Licenses       :
Maintainer     : jbeich@FreeBSD.org
WWW            : https://www.waterfoxproject.org/
Comment        : Distilled fork of Firefox
Options        :
        ALSA           : on
        BUNDLED_CAIRO  : on
        CANBERRA       : off
        DBUS           : on
        DEBUG          : off
        DTRACE         : on
        FFMPEG         : on
        GCONF          : on
        INTEGER_SAMPLES: off
        JACK           : on
        LIBPROXY       : off
        OPTIMIZED_CFLAGS: on
        PROFILE        : on
        PULSEAUDIO     : on
        SNDIO          : off
        TEST           : off
Shared Libs required:
        libdbus-glib-1.so.2
        libgtk-x11-2.0.so.0
        libXext.so.6
        libpango-1.0.so.0
        libjpeg.so.8
        libpixman-1.so.0
        libsqlite3.so.0
        libcairo.so.2
        libgtk-3.so.0
        libffi.so.6
        libxcb-shm.so.0
        libX11-xcb.so.1
        libfreetype.so.6
        libcairo-gobject.so.2
        libatk-1.0.so.0
        libhunspell-1.6.so.0
        libevent-2.1.so.6
        libXt.so.6
        libplc4.so
        libvpx.so.5
        libXcomposite.so.1
        libxcb.so.1
        libgdk_pixbuf-2.0.so.0
        libgio-2.0.so.0
        libssl3.so
        libXfixes.so.3
        libnss3.so
        libogg.so.0
        libv4l2.so.0
        libgobject-2.0.so.0
        libnssutil3.so
        libplds4.so
        libharfbuzz.so.0
        libstartup-notification-1.so.0
        libX11.so.6
        libdbus-1.so.3
        libXdamage.so.1
        libnspr4.so
        libgraphite2.so.3
        libicuuc.so.60
        libpng16.so.16
        libicui18n.so.60
        libvorbis.so.0
        libglib-2.0.so.0
        libfontconfig.so.1
        libsmime3.so
        libgdk-x11-2.0.so.0
        libgdk-3.so.0
        libXrender.so.1
Annotations    :
        FreeBSD_version: 1200037
        cpe            : cpe:2.3:a:mozilla:waterfox:56.0.3:::::freebsd12:x64:4
        deprecated     : Temporary experiment
        expiration_date: 2018-01-30
        no_provide_shlib: yes
        repo_type      : binary
        repository     : poudriere
Flat size      : 214MiB
Description    :
The Waterfox source code is a specialised modification of the Mozilla
platform, designed for privacy and user choice in mind. You should be
able to install it and compile Waterfox without any issues. Other
modifications and patches that are more upstream have been implemented
as well to fix any compatibility/security issues that Mozilla may lag
behind in implementing (usually due to not being high priority). High
request features removed by Mozilla but wanted by users are retained
(if they aren't removed due to security).

Features:

 o Disabled Encrypted Media Extensions (EME)
 o Disabled Web Runtime (deprecated as of 2015)
 o Removed Pocket
 o Removed Telemetry
 o Removed data collection
 o Removed startup profiling
 o Allow running of all 64-Bit NPAPI plugins
 o Allow running of unsigned extensions
 o Removal of Sponsored Tiles on New Tab Page
 o Addition of Duplicate Tab option (toggle with browser.tabs.duplicateTab)
 o Locale selector in about:preferences > General
 o Cookie Prompt

WWW: https://www.waterfoxproject.org/
[grahamperrin@momh167-gjp4-hpelitebook8570p-freebsd] ~%