This is at least a partial credits-file of people that have contributed to the 'Firefox-UI-Fix' project.
    It is sorted by name.
        The fields are: name (N), email (E), web-address(W), license(L).
    Thanks,

                 black7375
----------
    Reference Projects & Resources

N: Compact Mode Firefox Css
W: https://github.com/Godiesc/compactmodefirefoxcss
L: MPL 2.0

N: EdgeFox
W: https://github.com/23Bluemaster23/EdgeFox

N: EdgeTabSeparater.userChrome.css
W: https://gist.github.com/mmis1000/08d8de4bbe70c04423f0b966bcc286b1
L: MIT

N: firefox-csshacks
W: https://github.com/MrOtherGuy/firefox-csshacks
L: MPL 2.0

N: Fluent UI System Icons
W: https://github.com/microsoft/fluentui-system-icons
L: MIT

N: gecko-dev
W: https://hg.mozilla.org/
L: MPL 2.0

N: MaterialFox
W: https://github.com/muckSponge/MaterialFox
L: MIT

N: Multi-Account-Containers
W: https://github.com/mozilla/multi-account-containers
L: MPL 2.0

N: PS-Menu
W: https://github.com/chrisseroka/ps-menu
L: MIT

N: Quantum Nox Firefox Dark Full Theme
W: https://github.com/Izheil/Quantum-Nox-Firefox-Dark-Full-Theme
L: MPL 2.0

N: quietfox
W: https://github.com/coekuss/quietfox
L: MIT

N: ShadowFox
W: https://github.com/overdodactyl/ShadowFox
L: MIT

N: SVG Repo
E: info@svgrepo.com
W: https://www.svgrepo.com
L: CC0

N: uc.css.js
W: https://github.com/aminomancer/uc.css.js
L: CC BY-NC-SA 4.0

N: userChrome.csshacks
W: https://gist.github.com/DCzajkowski/baaf7bc81aae5278d690eaae951a823b
L: CC0

N: userChrome.css
W: https://gist.github.com/Dragoner7/ec2319e5038a6b4722d3e692713f9471
L: MPL 2.0

N: userChrome.org
W: https://www.userchrome.org/what-is-userchrome-css.html
L: CC BY 4.0

----------
    Major Contributors

N: AveYo
E: aveyo@yahoo.com
W: https://github.com/AveYo

N: Jan Janssen
E: medhefgo@web.de
W: https://github.com/medhefgo

N: Yunsup Sim
E: pedogunu@gmail.com
W: https://ethansup.net

----------
    Contributors

N: 7k5x
E: 7k5xlp0onfire@gmail.com
W: https://github.com/7k5x

N: Ajith-stark
E: ajith.kum.12342@gmail.com
W: https://github.com/Ajith-stark

N: badprogramshere
W: https://github.com/badprogramshere

N: Burak Yigit Kaya
E: ben@byk.im
W: https://byk.im/

N: dr460nf1r3
E: njcrypted@protonmail.com
W: https://dr460nf1r3.me/

N: hellojaccc
E: kim@taekyeong.me
W: https://github.com/hellojaccc

N: James Upjohn
E: jammehcow@jammehcow.co.nz
W: https://github.com/jammehcow

N: Jonta
W: https://github.com/Jonta

N: mamen
W: https://www.mamen.at

N: Tatsuyuki Ishi
E: ishitatsuyuki@gmail.com
W: https://github.com/ishitatsuyuki

N: Rahul Ramkumar
E: rahulram226@gmail.com
W: https://rahulramkumar.dev

N: Roel
E: Nyubis@gmail.com
W: https://github.com/Nyubis

N: SanderTheDragon
E: sanderthedragon@zoho.com
W: https://gitlab.com/SanderTheDragon

N: sean z
E: ean@vsxd.com
W: https://vsxd.com/

N: Sylvain
E: B00ze64@hotmail.com
W: https://github.com/B00ze64