This is necessary for seamonkey-2 p.mask removal Reproducible: Always
Created attachment 215954 [details, diff] Gtk2-MozEmbed-0.08.ebuild.patch possible patch You might look if www-client/icecat could be used instead of www-client/mozilla-firefox (through some || () dependency)
Created attachment 216036 [details] Gtk2-MozEmbed-0.08-r1.ebuild Another possibility, installs fine but I don't know how to test if it really works as intended.
This now becomes even more urgent. Upstream officially discontinued seamonkey-1 and also wrote about known unfixed security vulnerabilities. See this news post for reference: http://www.seamonkey-project.org/news#2010-03-16
Gtk2-MozEmbed-0.08-r1 no longer depends on seamonkey.