See this - https://support.mozilla.com/en-US/kb/Pop-up+blocker
You need to allow pop-ups for the domains where you want to see the pop-up windows.

Thank you for the reply, I appreciate it very much! I have disabled the pop-up blocker, didn't work. Re-abled (is that a word?HA!!) it and allowed the site as an exception and that didn't work either. It does work on IE however, so I'm quite confused ***scratching head*** Thanks again!

You're welcome.

Please use the Helpful button, when you are logged in here, to mark this thread as Solved.

I was thanking you for responding, but it's not solved. I still can not click on the pop-up and have it pop-up. Nothing happens. I've tried ctrl and clicking and all it does it bring up the exact same page, no pop-up. I've disabled the pop-ups that doesn't work. I've added the site as an exception to allow pop-up from that site and that does not work. I'm perplexed to say the least....Help :(

Make sure you don't have another pop-up blocker installed, like maybe as part of a security suite or anti-virus application.

I had the same issue. For me it was related to Firebug. Once I disabled Firebug everything started working again.

Thanks, Tim

-> Tap ALT key or press F10 to show the Menu Bar

-> go to Help Menu -> select "Restart with Add-ons Disabled"

Firefox will close then it will open up with just basic Firefox. Now do this:

-> Update Firefox to the latest version by going to Help Menu -> About Firefox -> click Check for Updates -> if an updated version is found then download the latest version and install it. After that follow these steps:

-> Update ALL your Firefox Plug-ins https://www.mozilla.com/en-US/plugincheck/

-> go to View Menu -> Toolbars -> unselect All Unwanted toolbars

-> go Tools Menu -> Clear Recent History -> Time range to clear: select EVERYTHING -> click Details (small arrow) button -> place Checkmarks on Cookies & Cache -> click "Clear Now"

-> go to Tools Menu -> Options -> Content -> Remove Checkmark from "Block Pop-up windows" -> place Checkmarks on:

1) Load images automatically 2) Enable JavaScript

-> go to Tools Menu -> Options -> Privacy -> History section -> Firefox will: select "Use custom settings for history" -> Remove Checkmark from "Permanent Private Browsing mode" -> place CHECKMARKS on:

1) Remember my Browsing History 2) Remember Download History 3) Remember Search History 4) Accept Cookies from sites -> select "Exceptions..." button -> Click "Remove All Sites" at the bottom of "Exception - Cookies" window

   4a) Accept Third-party Cookies -> under "Keep Until" select "They Expire"

-> REMOVE CHECKMARK from CLEAR HISTORY WHEN FIREFOX CLOSES

-> go to Tools Menu -> Options -> Security -> place Checkmarks on:

1) Warn me when sites try to install add-ons 2) Block reported attack sites 3) Block reported web forgeries 4) Remember Passwords for sites

-> Click OK on Options window

-> click the Favicon (small drop down menu icon) on Firefox SearchBar (its position is on the Right side of the Address Bar) -> click "Manage Search Engines" -> select all Unwanted Search Engines and click Remove -> click OK

-> go to Tools Menu -> Add-ons -> Extensions section -> REMOVE All Unwanted/Suspicious Extensions (Add-ons) -> Restart Firefox

You can enable your Known & Trustworthy Add-ons later. Check and tell if its working.