With the mozilla overlay, net-www/swfdec-mozilla-0.6.0 pulls net-libs/xulrunner-1.8.1.13 but should pull net-libs/xulrunner-1.9_beta5
I understand it works with 1.9?
I did not install swfdec-mozilla then.
The swfdec guys told me on irc it's ok with firefox 3 and I think I tried it with a previous beta of firefox 3.
Created attachment 149656 [details, diff] swfdec-mozilla-0.6.0.ebuild patch "Works for me": 64 bits system and net-libs/xulrunner-1.9_beta5 with www-client/mozilla-firefox-3.0_beta5
It does not even need xulrunner/mozilla to build. I removed the dep. May add some blockers later if we find incompatible xulrunner/mozilla builds.