{ inputs, config, lib, pkgs, ... }:

let
  cfg = config.ptw.programs.firefox;
in {
  options.ptw.programs.firefox = {
    enable = lib.mkEnableOption "Configure Firefox using HomeManager";
  };
 
  config = lib.mkIf cfg.enable {
    environment = {
      systemPackages = with pkgs; [ firefox-wayland tor-browser-bundle-bin ];

      # Deploy a Firefox policy to set the search engine and do some other things
      etc."firefox/policies/policies.json".source = ./policies.json;

      sessionVariables = {
        # Enable multi-touch...
        "MOZ_USE_XINPUT2" = "1";
        # ... and Wayland
        "MOZ_ENABLE_WAYLAND" = "1";
      };
    };
    
    home-manager.users."${config.ptw.system.singleUser}".programs.firefox = {
      enable = true;
      extensions = with pkgs.nur.repos.rycee.firefox-addons; [
        https-everywhere
        ublock-origin
        umatrix
        decentraleyes
        privacy-redirect
      ];
      profiles.default = {
        id = 0; # NOTE: This is important
        isDefault = true;
        name = "Default Profile";
        settings = {
          "browser.search.suggest.enabled" = false;
          "browser.tabs.drawInTitlebar" = true;
          "browser.aboutConfig.showWarning" = false;
          "browser.crashReports.unsubmittedCheck.autoSubmit" = false;
          "browser.crashReports.unsubmittedCheck.autoSubmit2" = false;
          "browser.crashReports.unsubmittedCheck.enabled" = false;
          "browser.newtabpage.activity-stream.section.highlights.includePocket" = false;
          "browser.newtabpage.activity-stream.feeds.topsites" = false;
          "browser.newtabpage.activity-stream.improvesearch.topSiteSearchShortcuts" = false;
          "browser.newtabpage.enabled" = false;
          "browser.newtabpage.enhanced" = false;
          "browser.newtabpage.introShown" = true;
          "browser.send_pings" = false;
          "browser.shell.checkDefaultBrowser" = false; # NixOS is a bit wonky here
          "app.shield.optoutstudies.enabled" = false;
          "app.normandy.api_url" = "";
          "app.normandy.enabled" = false;
          "breakpad.reportURL" = "";
          "services.sync.prefs.sync.browser.newtabpage.activity-stream.showSponsoredTopSite" = false;
          "signon.autofillForms" = false;
          "signon.rememberSignons" = false;
          "signon.management.page.breach-alerts.enabled" = false;
          "toolkit.telemetry.archive.enabled" = false;
          "toolkit.telemetry.bhrPing.enabled" = false;
          "toolkit.telemetry.cachedClientID" = "";
          "toolkit.telemetry.enabled" = false;
          "toolkit.telemetry.firstShutdownPing.enabled" = false;
          "toolkit.telemetry.hybridContent.enabled" = false;
          "toolkit.telemetry.newProfilePing.enabled" = false;
          "toolkit.telemetry.prompted" = 2;
          "toolkit.telemetry.rejected" = true;
          "toolkit.telemetry.reportingpolicy.firstRun" = false;
          "toolkit.telemetry.server" = "";
          "toolkit.telemetry.shutdownPingSender.enabled" = false;
          "toolkit.telemetry.unified" = false;
          "toolkit.telemetry.unifiedIsOptIn" = false;
          "toolkit.telemetry.updatePing.enabled" = false;
          "webgl.disabled" = true;
          "webgl.renderer-string-override" = " ";
          "webgl.vendor-string-override" = " ";
          "experiments.activeExperiment" = false;
          "experiments.enabled" = false;
          "experiments.manifest.uri" = "";
          "experiments.supported" = false;
          "extensions.getAddons.cache.enabled" = false;
          "extensions.getAddons.showPane" = false;
          "extensions.pocket.enabled" = false;
          "extensions.screenshots.upload-disabled" = true;
          "extensions.shield-recipe-client.api_url" = "";
          "extensions.shield-recipe-client.enabled" = false;
          "extensions.webservice.discoverURL" = "";
          "extensions.htmlaboutaddons.recommendations.enabled" = false;
          "media.autoplay.default" = 2;
          "media.eme.enabled" = false;
          "media.gmp-widevinecdm.enabled" = false;
          "media.navigator.enabled" = false;
          "media.peerconnection.enabled" = false;
          "media.video_stats.enabled" = false;
          "network.IDN_show_punycode" = true;
          "network.allow-experiments" = false;
          "network.captive-portal-service.enabled" = false;
          "network.cookie.cookieBehavior" = 1;
          "network.dns.disablePrefetch" = true;
          "network.dns.disablePrefetchFromHTTPS" = true;
          "network.http.referer.spoofSource" = true;
          "network.http.speculative-parallel-limit" = 0;
          "network.predictor.enable-prefetch" = false;
          "network.predictor.enabled" = false;
          "network.prefetch-next" = false;
          "network.trr.mode" = 5;
          "privacy.donottrackheader.enabled" = true;
          "privacy.donottrackheader.value" = 1;
          "privacy.trackingprotection.cryptomining.enabled" = true;
          "privacy.trackingprotection.enabled" = true;
          "privacy.trackingprotection.fingerprinting.enabled" = true;
          "privacy.trackingprotection.pbmode.enabled" = true;
          "privacy.usercontext.about_newtab_segregation.enabled" = true;
          "security.ssl.disable_session_identifiers" = true;
          # UI
          "ui.key.menuAccessKeyFocuses" = false;
          # Hardware Video Acceleration
          "media.ffmpeg.vaapi.enabled" = true;
          "media.ffvpx.enabled" = false;
          "media.rdd-vpx.enabled" = false;
          "media.navigator.mediadataencoder_vpx_enabled" = true;
          # WebRender
          "gfx.webrender.all" = true;
          # Better smooth scrolling
          "general.smoothScroll.msdPhysics.continuousMotionMaxDeltaMS" = 250;
          "general.smoothScroll.msdPhysics.enabled" = true;
          "general.smoothScroll.msdPhysics.motionBeginSpringConstant" = 450;
          "general.smoothScroll.msdPhysics.regularSpringConstant" = 450;
          "general.smoothScroll.msdPhysics.slowdownMinDeltaMS" = 50;
          "general.smoothScroll.msdPhysics.slowdownMinDeltaRatio;0" = 4;
          "general.smoothScroll.msdPhysics.slowdownSpringConstant" = 5000;
          "mousewheel.min_line_scroll_amount" = 22;
          "toolkit.scrollbox.horizontalScrollDistance" = 4;
          "toolkit.scrollbox.verticalScrollDistance" = 5;
          # Misc
          "layout.spellcheckDefault" = 0; # I don't use spellcheck
          "extensions.activeThemeID" = "firefox-alpenglow@mozilla.org"; # It's a nice theme
        };
      };
    };
  };
}