pkg upgrade deletes firefox?

[Ronald Klop]

Hi,

Today I get this...

# 21:08:42 root at sjakie [~]
pkg upgrade
Updating FreeBSD repository catalogue...
Fetching meta.txz: 100%    944 B   0.9kB/s    00:01
Fetching packagesite.txz: 100%    6 MiB   3.0MB/s    00:02
Processing entries: 100%
FreeBSD repository update completed. 25950 packages processed.
Checking for upgrades (13 candidates): 100%
Processing candidates (13 candidates): 100%
The following 13 package(s) will be affected (of 0 checked):

Installed packages to be REMOVED:
	firefox-51.0.1,1

Installed packages to be UPGRADED:
	xkeyboard-config: 2.19 -> 2.20
	xconsole: 1.0.6_1 -> 1.0.7
	xauth: 1.0.9_1 -> 1.0.10
	vim-lite: 8.0.0252 -> 8.0.0301
	tmux: 2.3 -> 2.3_1
	opencollada: 1.6.25 -> 1.6.37
	mplayer: 1.3.0.20161228_2 -> 1.3.0.20161228_3
	libevent2: 2.0.22_1 -> 2.1.8
	libass: 0.13.5 -> 0.13.6
	gstreamer1: 1.8.0 -> 1.8.0_1
	gstreamer: 0.10.36_5 -> 0.10.36_6
	ffmpeg: 3.2.2_5,1 -> 3.2.2_6,1

Number of packages to be removed: 1
Number of packages to be upgraded: 12

The operation will free 124 MiB.
25 MiB to be downloaded.

Proceed with this action? [y/N]:


Why would upgrade want to remove firefox?

Regards,
Ronald.