Ois. Depois de muito adiar, eu resolvi entrar em um forum para ver se juntos conseguimos resolver o problema do meu firefox...
Toda vez que eu digito
www.itau.com.br ... ele fecha.
utilizei o codigo anterior -safe-mode ... ele fecha, abri de novo, ele fecha.
o erro foi:
ismael@ismael:~$ firefox -safe-mode
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
The program 'Gecko' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadShmSeg (invalid shared segment parameter)'.
(Details: serial 370 error_code 166 request_code 145 minor_code 2)
(Note to programmers: normally, X errors are reported asynchronously;
that is, you will receive the error a while after causing it.
To debug your program, run it with the --sync command line
option to change this behavior. You can then get a meaningful
backtrace from your debugger if you break on the gdk_x_error() function.)
ismael@ismael:~$
Abraços e aguardo algumas ideias