Locate the file you downloaded, the firefox .exe file. It must be called Mozilla Firefox Setup 3.6.exe something like that very similar. Double click on the file to begin installation.
Once the install is under way agree to the license and accept the suggested default options.
At one stage within the Mozilla Firefox installation you will end up asked whether you would like to make Mozilla Firefox your default browser. It is advisable to initially answer “no.” That way you can test out Mozilla Firefox without altering all of your current Windows settings.
If later on you want to make Mozilla Firefox your default browser that can be done by selecting this option from within Mozilla Firefox.
After installation, the Mozilla Firefox Import Setting Wizard will run asking whether you would like to import your favorites, internet options, cookies, saved passwords along with a variety of other data settings Internet Explorer. Answer “yes” to all- having all of this information within Mozilla Firefox creates a much smoother transition.