If you want to download Firefox in another language, or for a different operating system, click the Systems & Language link right below the Download button.
Choose your install location. Firefox will automatically choose the spot it thinks is best to install to. You can change it if you wish. Install maintenance service. This will automatically update Firefox in the background. Disable this if you want to manually install updates. Choose where to place icons. You will be given the option to pick the Desktop, the Start Menu, and the Quick Launch bar. Choose whether you’d like Firefox to be the default browser. This means that any links you click will open with Firefox.
A useful Add-on is an ad blocker. Look for one able to block annoying pop-ups and animations that can detract from your viewing experience.