A config that tweaks Firefox to be more private and to have a cleaner look
The user.js is derived from Arkenfox, with personal modifications I try to always update mine when upstream gets updated
The theme files are from uc.css.js by aminomancer and firefox-csshacks by MrOtherGuy, with some of my own modifications added on top of them
For the color theme, I made a version of the Atom One Dark theme that can be downloaded from the official Firefox theme store.
You just need to copy the contents of this repo into the Firefox profile directory. How to find it
If you would like to use the theming scripts included (old screenshot action button, old style icons), you need to install fx-autoconfig. You can find the installation steps in their readme. There is nothing else you need to do, the scripts should be able to run right after installation.
For installing fx-autoconfig, you need to copy the files to the in the fx-autoconfig repo's program folder to the following directory: /usr/lib/firefox