Firefox Pop-ups

To allow pop-ups in Firefox

1. Click the menu button  and choose Options.

2. Select the Content panel.
3. Make sure the Block pop-up windows checkbox is checked.
4. To the right of Block pop-up windows, click the Exceptions... button. A dialog will appear that shows all the sites that are allowed to show pop-ups.
5. If the you want to enable pop-ups for a specific site, enter the web address and click Save Changes.

6. Close the about:preferences page. Any changes you've made will automatically be saved.