The filename of Apple's port of Sun/Oracle's Java Plugin2 has changed on OS X Lion (10.7). On OS X 10.5 and 10.6 it's JavaPlugin2_NPAPI.plugin. But on OS X 10.7 it's JavaAppletPlugin.plugin. Normally this wouldn't make any difference. But there's one place in current trunk code where the filename of Java Plugin2 is hard-coded: http://hg.mozilla.org/mozilla-central/annotate/0105b9691002/browser/app/profile/firefox.js#l948 We should do something about this. Probably the simplest solution would be to add the following line just after line 1948: pref("dom.ipc.plugins.enabled.i386.javaappletplugin.plugin", true); This would run JavaAppletPlugin.plugin out-of-process in 32-bit mode, if it was present.
Created attachment 527371 [details] [diff] [review] Potential fix
Landed on trunk: http://hg.mozilla.org/mozilla-central/rev/fc38b7841842