Will I still have the ability to access the Internet through IE after downloading Firefox?

Will I still be able to access the Internet through IE after downloading Firefox? Please make the answer very simple without a lot of "tech-ese" Thank you. == User Agent == Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; GTB6.5; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)