One possibility is that these windows are pop-up ads, but you are using an add-on or external software that blocks the ad page, leaving the window blank. Is there anything in the address bar of the windows showing what page was intended to load?

I am using pop up blockers. Basically the page just says Mozilla or Firefox on the header along with a bunch of letters and numbers. Like I said this just started a few days ago

So the pages are not blank, they are a jumble of letters and numbers? Or the addresses of the pages are a jumble of letters and numbers?

I'm having a hard time picturing this...

On these pages, can copy the addresses from the address bars (or right-click the page and use View Page Info to find the address) and paste them into a reply here?

It looks like this- http://gir.driveropti.net/sd/dw31.html?u=http%3A%2F%2Fgir.driveropti.net%2Fsd%2Fapps%2Ffusionx%2F0.0.4.html%3Faff%3D2040-4033&p=Remarkit&a=&c=2040-4033&b=firefox&bv=27&t1=1394847334237&tt=1394847334237&r=www.atarata.com&ua=0&n=yb_fusionx&sn=&mpa=0&mp=0 There was more but this should give you an idea of what I am talking about

You can restart Firefox in Safe Mode using

Help > Restart with Add-ons Disabled

In the dialog , click "Start in Safe Mode" (not Reset)

Here is the link :- https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode

If Firefox behaves better in Safe Mode, the most likely culprit is an extension.

This article might help you track it down and remove it: Remove gir.driveropti.net pop-up ads (Virus Removal Guide).

Any luck?

Can you attach a screenshot?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

Use a compressed image type like PNG or JPG to save the screenshot.