Mozilla Firefox
 

Somehow, it asked me for my profiles one day as I started the computer, said that "default" was already in use, so I went back to an old one. However, on this old one, a few sites won't work properly, but when I use Internet Explorer, they work fine. Is there anyway to change this profile back to the one I have been using?

Thanks in advance.

I'm sorry for bumping this, but if anyone has any possible solutions...

I have had the same problem in the past and to fix it all I do ctrl+alt+dlt, go into task manager and find firefox somewhere in there. Not really having a lot of knowledge I think the program closes but doesn't shut down sometimes. This should solve your problem!

God Luck

I am not using Firefox right now but I think there is a way to manage your profiles under the tools up on the top of the browser

To access the Profile Manager:-

Click - Start > Run > (type) firefox.exe -p (firefox[dot]exe[space]-p)

Once opened you can select, create, delete and rename Profiles and there's an option to have it open on every Firefox start.

bhelser is correct about closing Firefox properly.

Thank you both, Bhelser and keith.evans, it was exactly what I was looking for.