>  どういうエラーが出るのですか?
先程、追伸でお送りしましたが、あらためて

# cd /usr/ports/www/firefox
# make clean
===>  Cleaning for firefox-2.0.0.14,1
rm: /usr/ports/www/firefox/work/mozilla/caps/idl/_xpidlgen1: Invalid argument
rm: /usr/ports/www/firefox/work/mozilla/caps/idl: Directory not empty
rm: /usr/ports/www/firefox/work/mozilla/caps: Directory not empty
rm: /usr/ports/www/firefox/work/mozilla/rdf/base/idl/_xpidlgen1:
Invalid argument
rm: /usr/ports/www/firefox/work/mozilla/rdf/base/idl: Directory not empty
rm: /usr/ports/www/firefox/work/mozilla/rdf/base: Directory not empty
rm: /usr/ports/www/firefox/work/mozilla/rdf: Directory not empty
rm: /usr/ports/www/firefox/work/mozilla: Directory not empty
rm: /usr/ports/www/firefox/work: Directory not empty
*** Error code 1

Stop in /usr/ports/www/firefox.
*** Error code 1

Stop in /usr/ports/www/firefox.

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