Is any one else getting "pop under" ads? My Firefox is updated to the latest version, with pop-ups blocked and strict controls. But recently ads have been appearing at the bottom of the page, which must be clicked to go away. They only appear at the bottom of the page, and started appearing within the last 6 weeks or so.
As Firefox successfully wards off ads on the rest of the page, I'm wondering why the bottom of the page is an exception, and what if anything can be done about it. I have checked and re-checked my settings to block pop-ups, tracking, etc, but this seems to be something else.