vista - internet explorer will browse internet but firefox can not

I have a solid internet connection and internet explorer can browse the internet. However, firefox can not detect the internet. Can anyone help?

Hello,

What version of Firefox are you using?

Firefox 3.5.2, and I also discovered that vista will not allow other programs to access the internet, such as google chrome installer, magicjack (internet phone), or googleupdate.exe. Any ideas?

When Internet Explorer connects to the internet, do you notice sites you visit redirect you to other pages, or other suspicious activity?

No redirection. IE works as advertised. Problem is that no other web browsers, including firefox or google chrome, will work. Nor will magicjack (internet phone).

I had this problem 2 years ago its probably because of your anti-virus software. Some can block programs from entering the internet on default you have to manually switch them, what anti-virus do you have?