Block Log
Block Log is a list of URLs which the blocked popups were navigated to.

Remove
Delete the selected domain(s) in the Block Log. You can do multiple selection by holding down CTRL or SHIFT key. If no domain is selected or no domain in Block Log, this button is disabled.
Clear
Delete all domains in the Block Log. If no domain in Block Log, this button is disabled.
Browse
Navigate the browser to selected domain. If no domain in Block Log or multiple domain are selected, this button is disabled.