{
  config,
  firefox-gx-src,
  pkgs,
  self,
  ...
}: let
  inherit (config.vars) hostName;

  inherit (self.legacyPackages.${pkgs.system}) firefoxAddons;

  firefox-gx = pkgs.callPackage ./gx-theme.nix {
    inherit firefox-gx-src;
  };
in {
  home.file = {
    ".mozilla/firefox/matt/chrome/userContent.css".source = "${firefox-gx}/chrome/userContent.css";
    ".mozilla/firefox/matt/chrome/components".source = "${firefox-gx}/chrome/components";
    ".mozilla/firefox/matt/chrome/images".source = "${firefox-gx}/chrome/images";
    ".mozilla/firefox/matt/chrome/icons".source = "${firefox-gx}/chrome/icons";
  };

  programs.firefox = {
    enable = true;
    profiles.matt = {
      isDefault = true;
      id = 0;

      userChrome = ''
        @import url("file://${firefox-gx}/chrome/userChrome.css");
        ${import ./custom-css.nix hostName}
      '';

      settings = {
        # Theme
        "firefoxgx.tab-shapes" = true;
        "firefoxgx.left-sidebar" = true;
        "userChrome.tab.bottom_rounded_corner" = true;
        "userChrome.tab.bottom_rounded_corner.wave" = false;
        "userChrome.tab.bottom_rounded_corner.australis" = true;
        "widget.use-xdg-desktop-portal.file-picker" = 1;

        # Firefox-gx user.js
        /*
        Default rules
        */
        "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
        "svg.context-properties.content.enabled" = true;
        "layout.css.color-mix.enabled" = true;
        "browser.tabs.delayHidingAudioPlayingIconMS" = 0;
        "layout.css.backdrop-filter.enabled" = true;
        "browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar" = false;
        "browser.newtabpage.activity-stream.newtabWallpapers.enabled" = true;

        /*
        To active container tabs without any extension
        */
        "privacy.userContext.enabled" = true;
        "privacy.userContext.ui.enabled" = true;
        "privacy.userContext.longPressBehavior" = 2;

        # Open previous windows and tabs
        "browser.startup.page" = 3;

        # Prefs
        "layout.css.devPixelsPerPx" = 1.12;
        "browser.search.widget.inNavBar" = true;
        "browser.toolbars.bookmarks.visibility" = "always";
        "browser.toolbars.bookmarks.showInPrivateBrowsing" = true;
        "ui.key.menuAccessKey" = 0;

        # remove telemetry
        "datareporting.policy.dataSubmissionEnabled" = false;
        "datareporting.healthreport.uploadEnabled" = false;
        "datareporting.healthreport.infoURL" = "";
        "dom.security.https_only_mode" = true;

        # remove first run and warning stuff
        "datareporting.policy.firstRunURL" = "";
        "browser.aboutwelcome.enabled" = false;
        "browser.aboutConfig.showWarning" = false;

        # Disable firefox autofill
        "signon.rememberSignons" = false;
        "extensions.formautofill.addresses.enabled" = false;
        "extensions.formautofill.creditCards.enabled" = false;

        # remove new tab stuff
        "extensions.pocket.enabled" = false;
        "services.sync.prefs.sync.browser.newtabpage.activity-stream.feeds.section.topstories" = false;
        "browser.newtabpage.activity-stream.section.highlights.includePocket" = false;
        "browser.newtabpage.activity-stream.feeds.system.topstories" = false;
        "browser.newtabpage.activity-stream.feeds.section.topstories" = false;
        "browser.newtabpage.activity-stream.feeds.topsites" = false;
        "browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons" = false;
        "browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features" = false;
      };

      search = {
        default = "DuckDuckGo";
        force = true;
        engines = {
          "Nixpkgs" = {
            urls = [
              {
                template = "https://github.com/search?q=repo%3ANixOS%2Fnixpkgs%20{searchTerms}&type=code";
              }
            ];
            iconUpdateURL = "https://github.githubassets.com/favicons/favicon.png";
            updateInterval = 24 * 60 * 60 * 1000; # every day
            definedAliases = ["@pkgs"];
          };

          "NixOS Wiki" = {
            urls = [
              {
                template = "https://nixos.wiki/index.php?search={searchTerms}";
              }
            ];
            iconUpdateURL = "https://nixos.wiki/favicon.png";
            updateInterval = 24 * 60 * 60 * 1000; # every day
            definedAliases = ["@nw"];
          };

          "MyNixos" = {
            urls = [
              {
                template = "https://mynixos.com/search?q={searchTerms}";
              }
            ];
            iconUpdateURL = "https://mynixos.com/favicon.ico";
            updateInterval = 24 * 60 * 60 * 1000; # every day
            definedAliases = ["@mn"];
          };

          "Noogle" = {
            urls = [
              {
                template = "https://noogle.dev/q?term={searchTerms}";
              }
            ];
            iconUpdateURL = "https://noogle.dev/favicon.ico";
            updateInterval = 24 * 60 * 60 * 1000; # every day
            definedAliases = ["@ng"];
          };

          "Firefox Add-ons" = {
            urls = [
              {
                template = "https://addons.mozilla.org/en-US/firefox/search/?q={searchTerms}";
              }
            ];
            iconUpdateURL = "https://addons.mozilla.org/favicon.ico";
            updateInterval = 24 * 60 * 60 * 1000; # every day
            definedAliases = ["@fa"];
          };

          "ProtonDB" = {
            urls = [
              {
                template = "https://www.protondb.com/search?q={searchTerms}";
              }
            ];
            iconUpdateURL = "https://www.protondb.com/favicon.ico";
            updateInterval = 24 * 60 * 60 * 1000; # every day
            definedAliases = ["@pdb"];
          };

          "YouTube" = {
            urls = [
              {
                template = "https://www.youtube.com/results?search_query={searchTerms}";
              }
            ];
            iconUpdateURL = "https://www.youtube.com/favicon.ico";
            updateInterval = 24 * 60 * 60 * 1000; # every day
            definedAliases = ["@yt" "@youtube"];
          };

          "Bing".metaData.hidden = true;
          "Google".metaData.hidden = true;
          "eBay".metaData.hidden = true;
        };
        order = [
          "DuckDuckGo"
          "MyNixos"
          "NixOS Wiki"
          "Nixpkgs"
          "Noogle"
          "Wikipedia (en)"
          "YouTube"
          "Firefox Add-ons"
          "ProtonDB"
          "Amazon.ca"
        ];
      };

      extensions = with firefoxAddons; [
        bitwarden
        checkmarks-web-ext
        darkreader
        floccus
        google-container
        image-search-options
        istilldontcareaboutcookies
        opera-gx-witchcraft-purple
        return-youtube-dislikes
        seventv
        sponsorblock
        sound-volume
        stylus
        ttv-lol-pro
        ublock-origin
        undoclosetabbutton
      ];
    };
  };
}