Excellent news -- and if you ever find that mainstream Firefox is starting to slow down and/or use too much memory on your Windows 7 rig -- permit me to recommend a variety of Firefox "forks" that are usually lean and fast, and remind one of Firefoxes and Netscapes of yore (some representative ones to check out include Palemoon, Seamonkey, as well as the little-known ArcticFox that comes with a WinXP build but should be compatible with Win7 too).
In the worst case scenario -- if you find yourself unimpressed by those various browsers, fire up a small VirtualBox install of a simpler Linux distro like LinuxMint, and run an updated Firefox, Opera, or anything else -- from within the virtual OS system itself -- but go down the VirtualBox route only if you have enough RAM on your rig -- recommended min. of 10-12 GB RAM if you want to juggle a virtualized OS install smoothly.
Cheers all & happy browsing in lesser-known browsers,
Von S