possible bug?

I was exploring PortableFreeware.com and I found this:
http://www.portablefreeware.com/index.php?p=2&so=p (scroll down to see the Firefox Portable section)

It says

Stealth: No. By default, crash files are created in the %APPDATA%Mozilla directory. To make stealth, edit \App\Firefox\application.ini and replace:

[Crash Reporter]
Enabled=1
ServerURL=https://crash-reports.mozilla.com/submit

with:

[Crash Reporter]
Enabled=0
ServerURL=https://crash-reports.mozilla.com/dontsubmit
MOZ_CRASHREPORTER_DISABLE=1

This will ensure only an empty directory is created.

I searched about it, and I found somebody reported a bug in thunderbird, but not firefox.

Has this been fixed? I saw the date i was last updated (June 28, 2010) and it made me think no. But their screenshot is out of date so it makes me confused!