??? why use Firefox or Chrome, I use my standard homepage MSN, works fine. First off you probably need to turn off pop up blocker which should be in your upper right corner of your tool bar. I dont no much about Firefox or Chrome dont care to.
Your main problem probably is Your pop up blocker is on or your windows firewall is on that doesnt allow it.
Or the free credit gods are finally getting you there putting the whammy on you from getting free credits again..LOL.. And for that one guy who said just use your credit card now thats a Joke, Never use your CC on here.
If it started recently go to a restore point and restore it to a earlier date. My computer when and if I do it will tell me what was installed or uninstalled on what date.