The my_firefox.tar.xz archive contains my personal browser configuration, addons, and themes for Firefox Nightly, as well as a settings file template for Tabliss.
The contents should be pasted into a new Firefox profile (except "tabliss.json", which should be imported via Tabliss settings).

DISCLAIMER: Applying these files to an existing profile could cause damage if it has existing custom CSS themes, conflicting addons, or other unforeseen differences.
If you want to apply this to an existing profile, I recommend applying all files to a new, temporary profile, downloading chosen addons directly to the primary one, copying over the userChrome.css file, then manually adjusting browser settings and UI until they match.

Your Firefox profile can be found by going to: "about:profiles" in the address bar, and opening the root directory of the default profile (or whichever profile you want to apply my configuration to).

The configuration contains:
  Addons
    - Dark Reader
    - Decentraleyes
    - Ghostery Tracker & Ad Blocker - Privacy AdBlock
    - Privacy Badger
    - Tabliss
        - I use a solid #212121 background color, clock widget with 24-hour time and seconds (Noto Sans Mono - Thin), and a Quick Links widget with 4x4 links and no icons (Noto Sans Mono - Light).
    - TWP - Translate Web Pages
    - uBlock Origin
    - It's not included, but I recommend the Bitwarden or KeePassXC password managers. As well as the Frame wallet, a very powerful wallet for Ethereum cryptocurrencies (requires the app to be installed).
  Themes
    - Waterfall custom CSS theme (modified to my own preferences, from https://github.com/crambaud/waterfall)
  Settings
    General
      - Appearance: Dark
      - Font: Noto Sans
      - Default settings for everything else
    Home
      - Homepage and new windows: Tabliss
      - New tabs: Tabliss
      - Select only "Web Search", and "Shortcuts"
    Search
      - Default Search Engine: DuckDuckGo
      - Select only "Show search suggestions" under "Search Suggestions"
      - Select only "Bookmarks" under "Address Bar"
      - Go to https://searx.work/ to add it to the list of search engines. Use and configure it if desired.
    Privacy & Security
      - Enhanced Tracking Protection: Strict
      - Website Privacy Preferences: select as desired
      - Cookies and Site Data: select "Delete cookies and site data when Nightly is closed", manage exceptions as desired
      - Cookie Banner Blocker: select "Automatically refuse cookie banners" 
      - Deselect all under "Passwords" and "Autofill"
      - Select "Use custom settings for history" under "History", deselect all except for "Clear history when Nightly closes"
      - Select all except "Site settings" under settings for "Clear history when Nightly closes"
      - Nightly Data Collection and Use: deselect all
      - HTTPS-Only Mode: Enable HTTPS-only mode in all windows
      - DNS over HTTPS: increased protection
    UI elements:
      - Hide title bar
      - Placement (left to right): Search bar, Back, Downloads (Hide when empty), Extensions (None pinned), More tools, Application menu, open tabs area, New Tab, List all tabs.
    Bookmarks
      - Only show bookmarks on new tab