use a popup blocker addon like https://addons.mozilla.org/en-US/firefox/search/?q=popup+blocker&appver=50.0&platform=windows

'''shivank15''' those are desktop Firefox extensions as the Extensions for Android Firefox are listed in https://addons.mozilla.org/android/ Also there are no Popup blocker extensions anyways except for ones that works with the built in popup blocker on desktop and Android. ''antaryami26 [[#question-1146553|said]]'' <blockquote> How to enable pop up blocking </blockquote> It should be enabled by default. It is not a Ad blocker though.