Hi there you want to follow these: Orange FireFox Button in top left of screen >> Options >> options >>> advanced >> Network tab>> connections>> settings and enter your proxy settings from there. This link has pictures to assist too. http://www.wikihow.com/Enter-Proxy-Settings-in-Firefox Since your new and bound to have other questions you might find this useful too: https://support.mozilla.org/en-US/products/firefox/get-started