How to block pop-ups in Firefox

Block pop-ups in Mozilla Firefox

1. Click on the Tools Menu in the top menu bar (for Windows users) or Firefox menu (for MAC users.
2. Click Options (for Windows) or Preferences (for MAC). The corresponding box will now open.
   
3. Click the Content icon.
4. Make sure to check the "Block Pop-up Windows" box.
5. Click the Exception button to the right of "Block Pop-up Windows". A dialogue box will now appear, you can now input the web addresses that you wanted to allow for pop-ups.
6. Click Close.
7. Click OK.

Does this helps? If you have more queries you can visit this link - Mozilla Firefox Support