I was referring to the fact that when you uninstall FF3 and install FF2 instead, you open mintInstall (ex. from the menu) and the button "Go to the LinuxMint Software Portal" (and such) does nothing. Apparently the "firefox" command is associated with FF3, while the command for FF2 is "firefox-2".
I suppose mintInstall calls the "firefox" command, so if you uninstalled FF3, pressing that button does nothing.
I wonder how Opera or Epiphany users deal with this... maybe mintInstall needs an option to change the default browser command.