There is a built-in pop-up blocker. For more you need to search the add-ons site.

https://support.mozilla.org/en-US/kb/pop-blocker-settings-exceptions-troubleshooting https://addons.mozilla.org/firefox/

Thanks for considering the problem but these suggestions do not address the problem. The pop-up blocker is on, but the pop-ups continue. They appear to be triggered by using the mouse. It would be lovely if Mozilla could stop this problem.

Thanks for trying guys.

Can you post a screenshot of such a pop-up?

I have attached a screen shot of one typical pop-up as requested. It was difficult to capture as the Snipping Tool wanted to treat the pop-up differently to the underlying web page. I had to confine my snip to the actual pop-up to capture this image. I hope this helps and thanks for considering this issue.

And here is another screen shot of a pop-up, not so difficult to capture with the Snipping Tool.

I also notice that both pop-ups cannot be moved to another part of the screen by a mouse. They appear "nailed onto" the screen - not sure if this is useful but cannot hurt to give more data.

I only see a pop-up on the johnmenadue.com website. I can hide it with code in userContent.css.

• https://johnmenadue.com/category/politics/

@-moz-document domain(johnmenadue.com) {
.et_bloom .et_bloom_visible,
.et_bloom .et_bloom_flyin  { display: none !important; }
}

More info about userContent.css and userChrome.css in case you are not familiar: *https://www.userchrome.org/what-is-userchrome-css.html

• https://www.userchrome.org/how-create-userchrome-css.html
• https://www.userchrome.org/firefox-changes-userchrome-css.html

In Firefox 69 and later you need to set this pref to true on the about:config page to enable userChrome.css and userContent.css in the chrome folder.

• about:config => toolkit.legacyUserProfileCustomizations.stylesheets = true
• https://support.mozilla.org/en-US/kb/about-config-editor-firefox