Hi Firefox for Android does not have a pop-up blocker, so unless you have installed one through an add-on, the only thing I can think of that you may want to look at is display the website on your mobile device as a desktop site. You can read a short walk though on how to do this [https://support.mozilla.org/en-US/kb/how-do-i-change-desktop-view-firefox-android here]. I hope this helps, but if not, please come back here and we can look into a different solution for you.