{ inputs, config, pkgs, username, ... }:
let
    owner = "arkenfox";
    repo = "user.js";
    version = "117.0";
in
{
    programs.firefox = {
        enable = true;

        profiles."default" = {
            extensions = with pkgs.nur.repos.rycee.firefox-addons; [
                ublock-origin
                multi-account-containers
            ];
            extraConfig = builtins.readFile
            ( builtins.fetchTarball {
                url = "https://github.com/${owner}/${repo}/archive/refs/tags/${version}.tar.gz";
                sha256="1pll4fbdn2390n05902l3pkg4rizxghkakpzi1r9z1b7blmk1x4s";
            } + "/user.js");
            search = {
                force = true;
                default = "DuckDuckGo";
                engines = {
                    "Nix Packages" = {
                        urls = [{
                            template = "https://search.nixos.org/packages";
                            params = [
                                { name = "type"; value = "packages"; }
                                { name = "query"; value = "{searchTerms}"; }
                            ];
                        }];
                        definedAliases = [ "@np" ];
                    };
                    "NixOS Wiki" = {
                        urls = [{ template = "https://nixos.wiki/index.php?search={searchTerms}"; }];
                        iconUpdateURL = "https://nixos.wiki/favicon.png";
                        updateInterval = 24 * 60 * 60 * 1000;
                        definedAliases = [ "@nw" ];
                    };
                };
            };
            settings = {
"browser.download.dir" = "/home/${username}/dwn";
            };
        };
    };
}