firefox say 'Could not find compatible GRE between version 1.9.2.7 and 1.9.2.7.', but the version of xulrunner is 1.9.2.7. and I found that when compiling xulrunner, autoheader failed, but ebuild goes on.
Created attachment 239907 [details] autoheader.out
Created attachment 239909 [details] emerge --info
*** This bug has been marked as a duplicate of bug 329563 ***