fairly constant throughout (screenshot). Error 1: nsIMenuBar.h: No such file or directory Woops! First error compiling. Note to self for next time: should have used tee to easier log errors. ... /home/jb/mozilla-dev/mozilla/xpfe/appshell/src/nsWebShellWindow.cpp:77:24: error: nsIMenuBar.h: No such file or directory ... No good. I asked #firefox and there was no-one around who