browser binary packages: very large or missing

[IdOp]

Here is a quick survey of binary packages for the two full-featured browsers I use, for my three favourite operating systems:

NetBSD/i386
-----------

2013Q2
        firefox 22.0            42 MB

        seamonkey               missing

2013Q1
        firefox 19.0.2          28 MB
        xulrunner-19.0.2nb1     36 MB

        seamonkey 2.16.nb1      45 MB

OpenBSD/i386
------------

        firefox-18.0.2p0        22 MB

        seamonkey-2.15.2        27 MB


Linux/i386
----------

        firefox-23.0.1          25 MB

        seamonkey-2.20          27 MB

Questions:

1) Why is there no binary package for seamonkey in the latest NetBSD pkgsrc ?

2) The latest NetBSD binary packages available for both these browsers are just huge compared to both OpenBSD and Linux. If one were to go back a little further in the versions available, the gap would not be that big. What happened?

Thanks for any insights.

[IdOp]

An update: The latest 2013 Q3 binary packages are available, and seamonkey is back.

firefox-24.0.tgz      44 MB
seamonkey-2.21.tgz    47 MB

The packages are still large.