Icecat[0] might be the closest thing to what you are looking for. It's part of the GNU project.
Re:Firefox partners with ProtonVPN
by Wowfunhappy on Wednesday December 05, 2018 @12:14PM
(#18610240)
No binary releases for Windows. :(
Re:Firefox partners with ProtonVPN
by raw_creations on Wednesday December 05, 2018 @11:42PM
(#18615478)
38.8.0 was the last one. https://ftp.gnu.org/gnu/gnuzilla/38.8.0/
Firefox is my primary browser on Windows, and I'd love to have this stuff removed, but I'm really not at a point where I can be compiling the code myself.