If you are using Iguana 4.0 in the Firefox 3.x browser and the Browse button is disabled, perform the following steps to enable directory browsing:

• Log out of Iguana. (You do not need to stop any active channels.)
• In Firefox 3.x, open a new browser tab.
• In the URL field, type about:config.
• In the Filter field, type signed.applets.codebase_principal_support.
• If this field is set to false, double-click anywhere in the field definition to set its value to true. (Double-clicking toggles the field value: if it is already true, double-clicking sets it to false.)
• Restart Firefox and log back into Iguana. You should now be able to use the Browse button.

	Versions of Iguana that are more recent than 4.0 do not have this problem, as directory browsing has been updated and improved.