How to Permanently Block Pop Ups on Firefox

1. Click the orange 'Firefox' menu button at the top-left corner of the Mozilla Firefox window.
2. Click 'Options' in the menu.

3. Click the 'Content' icon at the top of the options window.
4. Click the 'Block Pop-up Windows' checkbox if it's unchecked.
5. Click the 'Exceptions' button to the right the Block Pop-up Windows checkbox.
6. Click the 'Remove All Sites' button at the bottom of the exception window and click 'Close.'
7. Click 'OK.'