Block Log
Block Log is a list of URLs which the blocked popups were navigated to. Please note it's the exact URLs of popup ads.

Remove
Delete the selected URLs in the Block Log. You can do multiple selection by holding down CTRL or SHIFT key. If no URL is selected or no URL in Block Log, this button is disabled.
Clear
Delete all URLs in the Block Log. If no URL in Block Log, this button is disabled.
Browse
Navigate the browser to selected URL. If no URL in
Block Log or multiple URL are selected, this button is disabled.
You can use this function to review the content of the blocked popup.