Enabling or Blocking Popups in Mozilla Firefox 1. Click the menu button in the top right corner of your window, then click Options from the drop-down menu. 2. Click the Privacy and Security tab, then scroll down until you see the Permissions header. From here you can check the box to Block popups, and click Exceptions to only allow popups from certain sites. 3. In the Allowed Websites window enter the address of the site (https://blackboard.forsythtech.edu for example), then click Allow and Save Changes.
