Troubleshoot by create new browser profile.

If problem solved it's not program but user specific configuration.

Open terminal, become root

/usr/bin/firefox -ProfileManager

Create a new profile,uncheck "Don't ask at Startup"

Reboot,login as user that had problem.

Launch Shiretoko,pick the new profile.

See this: http://support.mozilla.com/en-US/kb/Recovering%20important%20data%20from%20an%20old%20profile

If fixed mozilla has instructions for importing bookmarks and other data from damaged profile

If that doesn't fix then:

Logout of SliTaz and login as root, or create another user and see if it has the same problem.

Hi, cavalier, thanks for the help. This is what happened, after rebooting:

1- As the "root" user: I'm given the option to and can change to the new profile, but the problem with the opening of the containing folder remains.

2- As the "tux" user: I'm neither given the option to change the profile neither is "opening the containing folder" working.

What intrigues me is the problem not being reported by anybodyelse

Hi
I got the same problem :) I hope that makes you feel better :)
But now to the worse part of my message
I can't fix it either :)
greetz
Nik

Nik. thanks. It's nice to not bee alone :)

Same problem for me, the command to open folder and the mimestypes configuration files wich tell wich program to use to open downloaded files seems not configured.