After a correct Mozilla compilation, a simple execution give the following messages: grep: /usr/lib/mozilla/chrome/locale.alias: No such file or directory Segmentation fault My CFLAGS='-O3 -pipe -fomit-frame-pointers' Using GDB, I can follow the execution to this point: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 1024 (LWP 19144) 0x401d97cd in CopyChars1To2(char*, int, char const*, unsigned, unsigned) () from /usr/lib/mozilla/libxpcom.so I'm not using beta packages (not ACCEPT_KEYWORDS).
And as root ?