mozplugger plugins does not work in www-client/firefox-3.6.12 because off the missing plugin. simple workaround: ln -s /usr/lib/mozilla/plugins/mozplugger.so /usr/lib/nsbrowser/plugins Reproducible: Always
Be sure that new bugs are assigned to bug-wranglers@gentoo.org in the future. Also, consider adding emerge --info, people will probably ask for that.
remove your symlink in a few hours and sync then re-emerge mozplugger again. I fixed the install path so no symlink will be needed. Thanks for reporting.