nix: Add host polder and refractor modules

nixcfgs/modules/nixos/programs/chromium.nix

@@ -0,0 +1,15 @@
+{...}: {
+  programs.chromium = {
+    enable = true;
+    homepageLocation = "https://duckduckgo.com";
+    defaultSearchProviderSearchURL = "https://duckduckgo.com?q={searchTerms}";
+    extraOpts = {
+      "BrowserSignin" = 1;
+      "PasswordManagerEnabled" = false;
+      "ExtensionManifestV2Availability" = 2;
+    };
+    extensions = [
+      "cjpalhdlnbpafiamejdnhcphjbkeiagm" # ublock origin
+    ];
+  };
+}

nixcfgs/modules/nixos/programs/firefox.nix

@@ -0,0 +1,76 @@
+{...}: {
+  programs.firefox = {
+    enable = true;
+
+    languagePacks = ["zh-CN"];
+
+    preferences = {
+      "widget.use-xdg-desktop-portal.file-picker" = 1;
+      "widget.use-xdg-desktop-portal.mime-handler" = 1;
+      "screenshots.browser.component.enabled" = false;
+      "toolkit.telemetry.enabled" = false;
+      "toolkit.telemetry.archive.enabled" = false;
+      "browser.shell.checkDefaultBrowser" = false;
+      "browser.contentblocking.category" = "strict";
+      "browser.formfill.enable" = false;
+      "extensions.formautofill.creditCards.enabled" = false;
+      "dom.forms.autocomplete.formautofill" = false;
+      "browser.urlbar.update2.engineAliasRefresh" = true;
+      "browser.newtabpage.activity-stream.showSponsored" = false;
+      "browser.newtabpage.activity-stream.showSponsoredTopSites" = false;
+    };
+
+    policies = {
+      DisableTelemetry = true;
+      BlockAboutConfig = false;
+      DisableFirefoxScreenshots = true;
+      DontCheckDefaultBrowser = true;
+
+      ExtensionSettings = with builtins; let
+        extension = short: uuid: {
+          name = uuid;
+          value = {
+            install_url = "https://addons.mozilla.org/firefox/downloads/latest/${short}/latest.xpi";
+            installation_mode = "force_installed";
+          };
+        };
+      in
+        listToAttrs [
+          (extension "ublock-origin" "uBlock0@raymondhill.net")
+          (extension "multi-account-containers" "@testpilot-containers")
+          (extension "side-view" "@webcompat@mozilla.org")
+          (extension "clearurls" "{74145f27-f039-47ce-a470-a662b129930a}")
+        ];
+
+      SearchEngines = {
+        Default = "DuckDuckGo";
+        Add = [
+          {
+            Alias = "@np";
+            Description = "Search in NixOS Packages";
+            IconURL = "https://nixos.org/favicon.ico";
+            Method = "GET";
+            Name = "NixOS Packages";
+            URLTemplate = "https://search.nixos.org/packages?from=0&size=200&sort=relevance&type=packages&query={searchTerms}";
+          }
+          {
+            Alias = "@no";
+            Description = "Search in NixOS Options";
+            IconURL = "https://nixos.org/favicon.ico";
+            Method = "GET";
+            Name = "NixOS Options";
+            URLTemplate = "https://search.nixos.org/options?from=0&size=200&sort=relevance&type=packages&query={searchTerms}";
+          }
+          {
+            Alias = "@hm";
+            Description = "Search in Home Manager Options";
+            IconURL = "https://nixos.org/favicon.ico";
+            Method = "GET";
+            Name = "Home Manager options";
+            URLTemplate = "https://home-manager-options.extranix.com/?query={searchTerms}";
+          }
+        ];
+      };
+    };
+  };
+}

nixcfgs/modules/nixos/programs/obs-studio.nix

@@ -0,0 +1,13 @@
+{config, ...}: {
+  hardware.enableRedistributableFirmware = true;
+  boot.extraModulePackages = with config.boot.kernelPackages; [
+    v4l2loopback
+  ];
+  programs.obs-studio = {
+    enable = true;
+    enableVirtualCamera = true;
+  };
+  boot.extraModprobeConfig = ''
+    options v4l2loopback devices=1 video_nr=2 card_label="OBS Virtual Camera" exclusive_caps=1
+  '';
+}

nixcfgs/modules/nixos/programs/packages.nix

@@ -0,0 +1,8 @@
+{pkgs, ...}: {
+  environment.systemPackages = with pkgs; [
+    nil
+    nixd
+    libnotify
+    imagemagick
+  ];
+}