FreeBSD-CURRENT, installing outdated Waterfox 56.2.7

root@momh167-gjp4-8570p:~ # date ; uname -v
Fri Feb  8 10:26:38 GMT 2019
FreeBSD 13.0-CURRENT r343883 GENERIC
root@momh167-gjp4-8570p:~ # pkg install waterfox
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
Updating poudriere repository catalogue...
poudriere repository is up to date.
All repositories are up to date.
Checking integrity... done (0 conflicting)
The following 7 package(s) will be affected (of 0 checked):

Installed packages to be REMOVED:
        seamonkey-2.49.4_23
        palemoon-27.9.4_4
        opera-12.16_6
        gstreamer-plugins-vp8-0.10.23_6,3

New packages to be INSTALLED:
        waterfox: 56.2.7 [poudriere]

Installed packages to be DOWNGRADED:
        ffmpeg: 4.1_5,1 -> 4.1_4,1 [poudriere]
        libvpx: 1.8.0 -> 1.7.0_4 [poudriere]

Number of packages to be removed: 4
Number of packages to be installed: 1
Number of packages to be downgraded: 2

The operation will free 43 MiB.

Proceed with this action? [y/N]: y
[1/7] Deinstalling seamonkey-2.49.4_23...
rmdir: /usr/local/lib/seamonkey/chrome: Directory not empty
rmdir: /usr/local/lib/seamonkey: Directory not empty
[1/7] Deleting files for seamonkey-2.49.4_23: 100%
[2/7] Deinstalling palemoon-27.9.4_4...
rmdir: /usr/local/lib/palemoon: Directory not empty
[2/7] Deleting files for palemoon-27.9.4_4: 100%
[3/7] Deinstalling opera-12.16_6...
[3/7] Deleting files for opera-12.16_6: 100%
[4/7] Deinstalling gstreamer-plugins-vp8-0.10.23_6,3...
[4/7] Deleting files for gstreamer-plugins-vp8-0.10.23_6,3: 100%
[5/7] Downgrading libvpx from 1.8.0 to 1.7.0_4...
[5/7] Extracting libvpx-1.7.0_4: 100%
[6/7] Downgrading ffmpeg from 4.1_5,1 to 4.1_4,1...
[6/7] Extracting ffmpeg-4.1_4,1: 100%
[7/7] Installing waterfox-56.2.7...
[7/7] Extracting waterfox-56.2.7: 100%
Message from waterfox-56.2.7:

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

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)
- TCP fast open

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

On FreeBSD < 11.3 Web Content process may frequently crash due to bug 181741.
If you cannot upgrade try applying the following workaround:

$ sysctl net.local.stream.recvspace=16384

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

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.

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

===>   NOTICE:

This port is deprecated; you may wish to reconsider installing it:

Temporary experiment.

It is scheduled to be removed on or after 2018-09-27.
root@momh167-gjp4-8570p:~ # clear
root@momh167-gjp4-8570p:~ # pkg ugprade
pkg: unknown command: ugprade

For more information on available commands and options see 'pkg help'.
root@momh167-gjp4-8570p:~ # pkg upgrade
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
Updating poudriere repository catalogue...
poudriere repository is up to date.
All repositories are up to date.
Checking for upgrades (15 candidates): 100%
Processing candidates (15 candidates): 100%
Checking integrity... done (0 conflicting)
Your packages are up to date.
root@momh167-gjp4-8570p:~ #