Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Now in the Reply Box on the forum page, do a right-click in the box and select Paste.

This will show us your system details. No Personal Information Is Collected.

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

musicollector said

However, when I use IE or Chrome at this same site, the pop-ups do appear. TIA.

Hello musicollector,

When you're on that site click on the 'i' in a circle, next to the padlock at the left side of the address bar. That will take you to "Page Info". Then click on the little black arrow on the dropdown and then on "More Information". Click on the 'Permissions" tab and scroll down to "Open Pop-up Windows". Uncheck "Use Default" and check "Allow".

Then close and restart Firefox.

Do you see any pop-ups appearing now  ?

Wow! THANKS, McCoy! You rock! Who would have thought? When I went in the way you suggested, there was a check-mark next to Pop-up blocker.

This is very unintuitive. Not sure why Firefox is behaving this way. I mean, if I give the browser blanket permission to allow pop-ups, why is it over-riding it for individual sites? Doesn't make sense. :-(

But, anyway, I appreciate your help.

Thanks, FredMcD for taking the time. McCoy's suggestion is the cat's meow! It worked very well.

My pleasure, musicollector  !

In all honesty : I haven't a clue why you have to give per site permission, while you have unchecked that box in Privacy & Security ...... Maybe someone else can shine a light on it .....

Thanks, McCoy. My sentiments, exactly. I mean when I go to Options the normal way, through Tools, I see that the pop-up blocker is disabled. Common sense dictates that that is all that should be needed.

At least, now I know how to fix it on a case-by-case basis, thanks to you. :-)