r3dfox is release branch Firefox made to work on Windows 7/8. Also with limited compatibility for XP using OCAPI and Vista using the extended kernel.
Main download: Releases · Eclipse-Community/r3dfox · GitHub
Alternative download: r3dfox - Modern Firefox for Windows 7 - Browse Files at SourceForge.net
If you run into any bugs or issues, please report it on GitHub under the issues tab. I am more likely to get to it and remember to fix it if it’s there. If you don’t have a GitHub account, here is fine too though.