i need to turn off pop up blocker

   Open Firefox and click the menu button (three horizontal lines) in the top-right corner.
   Select Settings (or Preferences on Mac).
   Click on Privacy & Security in the left sidebar.
   Scroll down to the Permissions section.
   Uncheck the box next to Block pop-ups and third-party redirects (or Block pop-up windows). Your changes save automatically

On Desktop (Windows or Mac) Open Firefox and click the menu button (three horizontal lines) in the top-right corner. Select Settings (or Preferences on Mac). Click on Privacy & Security in the left sidebar. Scroll down to the Permissions section. Uncheck the box next to Block pop-ups and third-party redirects (or Block pop-up windows). Your changes save automatically https://support.mozilla.org/en-US/kb/pop-blocker-settings-exceptions-troubleshooting