xulrunner was trying to link the system X libraries instead of the prefix ones... Attached ebuild specifies the X prefix. Reproducible: Always
Created attachment 211245 [details] net-libs/xulrunner-1.9.1.5.ebuild
Created attachment 211246 [details, diff] patch for ebuild
Created attachment 211248 [details, diff] patch for ebuild
patch added, also to mozilla-firefox for consistency, thanks!
Reopening since the same problem is now present in mozilla-thunderbird too
ok, same fix added to mozilla-thunderbird ebuild now, thanks!