libmng is not required for mozilla, mozilla-firefox,mozilla-thunderbird, nvu and gecko-sdk. I test in 3 gentoos and check ldd and never reference to libmng Reproducible: Always Steps to Reproduce: 1. 2. 3.
Someone please have a look at the two other bugs as well. Thanks.
*** Bug 89760 has been marked as a duplicate of this bug. ***
MNG support has been removed from gecko in June 2003. I grepped the firefox 1.5.0.1 source code and there are no ocurrences of libmng except two in libpng.txt, which describes how to develop with libpng. At least the most recent ebuild of libmng does not work the way it is supposed to anyway (lcms), I hope I'll find the time to file a proper bug about that soon, but perhaps someone else wants to be first :-).
*** Bug 54651 has been marked as a duplicate of this bug. ***
This is still a legit request AFAIK. It appears that Moz products don't have libmng support still.... Am I wrong? If not I'll make the change.
Fixed in mozconfig.eclass & mozconfig-2.eclass. Left it in mozilla.eclass since it's a legacy eclass and shouldn't be used.