{ lib, config, pkgs, ... }:
with lib;
let
  merge = foldr (a: b: a // b) { };
  cfg = config.modules.web.firefox;
in
{
  options.modules.web.firefox = {
    enable = mkEnableOption "enable Firefox web browser";

    enableNixGL = mkOption {
      type = types.bool;
      default = false;
      description = "Use NixGL to start Firefox";
    };
  };
  config = mkIf cfg.enable {
    programs.browserpass = {
      enable = true;
      browsers = ["firefox"];
    };
    xdg.mimeApps.defaultApplications = {
      "text/html" = "firefox.desktop";
      "x-scheme-handler/http" = "firefox.desktop";
      "x-scheme-handler/https" = "firefox.desktop";
      "x-scheme-handler/about" = "firefox.desktop";
      "x-scheme-handler/unknown" = "firefox.desktop";
    };
    xdg.desktopEntries."firefox" = if cfg.enableNixGL then  {
      name = "Firefox NixGL Powered";
      exec = "${pkgs.nixgl.nixGLMesa}/bin/nixGLMesa firefox %U";
      icon = "firefox";
      terminal = false;
      type = "Application";
      startupNotify = true;
      actions = {
        "new-private-window" = {
          exec = "${pkgs.nixgl.nixGLMesa}/bin/nixGLMesa firefox --private-window %U";
          name = "New Private Window";
        };
        "new-window" = {
          exec = "${pkgs.nixgl.nixGLMesa}/bin/nixGLMesa firefox --new-window %U";
          name = "New Window";
        };
      };
    }
    else {};
    programs.firefox = {
      enable = true;
      package = pkgs.wrapFirefox pkgs.firefox-unwrapped {
        nativeMessagingHosts = [
          # Tridactyl native connector
          pkgs.tridactyl-native
          pkgs.browserpass
        ];
      };
      profiles.ephase = {
        id = 0;
        name = "ephase";
        isDefault = true;
        extensions = with pkgs.nur.repos.rycee.firefox-addons; [
          browserpass
          consent-o-matic
          cookie-autodelete
          darkreader
          decentraleyes
          tridactyl
          ublock-origin
        ];
        search = {
          force = true;
          default = "DuckDuckGo";
          engines =  { 
            "Nix Packages" = {
              urls = [{
                template = "https://search.nixos.org/packages";
                params = [
                { name = "type"; value = "packages"; }
                { name = "query"; value = "{searchTerms}"; }
                ];
              }];
              icon = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
              definedAliases = [ "@np" ];
            };

            "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" ];
            };

            "Bing".metaData.hidden = true;
            "Google".metaData.hidden = true;
            "Amazon.fr".metaData.hidden = true;
            "Facebook".metaData.hidden = true;
            "youtube".metaData.hidden = true;
          };
        };
        settings = merge [
          (import ./conf/doh.nix)
          (import ./conf/drm.nix)
          (import ./conf/experiments.nix)
          (import ./conf/extensions.nix)
          (import ./conf/preferences.nix)
          (import ./conf/privacy.nix)
          (import ./conf/safebrowsing.nix)
          (import ./conf/suggest.nix)
          (import ./conf/telemetry.nix)
          (import ./conf/theme.nix)
          (import ./conf/tracking.nix)
        ];
      };
    };
  };
}