diff --git a/flake.lock b/flake.lock
index 286a271..13ee505 100644
--- a/flake.lock
+++ b/flake.lock
@@ -77,6 +77,27 @@
         "type": "github"
       }
     },
+    "flake-parts_2": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "nur",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1733312601,
+        "narHash": "sha256-4pDvzqnegAfRkPwO3wmwBhVi/Sye1mzps0zHWYnP88c=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "205b12d8b7cd4802fbcb8e8ef6a0f1408781a4f9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems_2"
@@ -203,6 +224,27 @@
         "type": "github"
       }
     },
+    "nur": {
+      "inputs": {
+        "flake-parts": "flake-parts_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1763052046,
+        "narHash": "sha256-SHdav1soeHzFZFgAiRJORaSyB/D7FEd0ZH3JZLAcLy4=",
+        "owner": "nix-community",
+        "repo": "NUR",
+        "rev": "2712fb70b786a703e39fddf77414469d16654e94",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "NUR",
+        "type": "github"
+      }
+    },
     "nuschtosSearch": {
       "inputs": {
         "flake-utils": "flake-utils",
@@ -257,6 +299,7 @@
         "kwin-effects-forceblur": "kwin-effects-forceblur",
         "nixpkgs": "nixpkgs",
         "nixvim": "nixvim",
+        "nur": "nur",
         "plasma-manager": "plasma-manager"
       }
     },
diff --git a/flake.nix b/flake.nix
index a16aa88..9459ff1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,6 +20,11 @@
       inputs.home-manager.follows = "home-manager";
     };
 
+    nur = {
+      url = "github:nix-community/NUR";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
     nixvim = {
       url = "github:nix-community/nixvim";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -42,6 +47,7 @@
       catppuccin,
       home-manager,
       plasma-manager,
+      nur,
       nixvim,
       kwin-effects-forceblur,
       apple-silicon,
@@ -63,6 +69,7 @@
           modules = [
             {
               nixpkgs.overlays = [
+                nur.overlays.default
                 (import ./packages/widevine-firefox/overlay.nix)
                 (import ./packages/strawberry/overlay.nix)
                 (import ./packages/helium-browser/overlay.nix)
diff --git a/home/all.nix b/home/all.nix
index beb9238..a5fb926 100755
--- a/home/all.nix
+++ b/home/all.nix
@@ -27,6 +27,9 @@
     spotdl
     rclone
     helium-browser
+    deno
+    prettier
+    prettierd
 
     kde-rounded-corners
     kdePackages.partitionmanager
diff --git a/home/browsers/firefox/default.nix b/home/browsers/firefox/default.nix
new file mode 100644
index 0000000..eb311bb
--- /dev/null
+++ b/home/browsers/firefox/default.nix
@@ -0,0 +1,75 @@
+# https://discourse.nixos.org/t/combining-best-of-system-firefox-and-home-manager-firefox-settings/37721
+{ pkgs, ... }:
+
+{
+  programs.firefox = {
+    enable = true;
+    profiles = {
+      default = {
+        id = 0;
+        name = "default";
+        isDefault = true;
+        userChrome = ./userChrome.css;
+        extensions = {
+          force = true;
+          packages = with pkgs.nur.repos.rycee.firefox-addons; [
+            ublock-origin
+            plasma-integration
+            stylus
+            violentmonkey
+            consent-o-matic
+            privacy-badger
+            sponsorblock
+          ];
+          settings = {
+            "uBlock0@raymondhill.net".settings = {
+              selectedFilterLists = [
+                "ublock-filters"
+                "ublock-badware"
+                "ublock-privacy"
+                "ublock-unbreak"
+                "ublock-quick-fixes"
+              ];
+            };
+
+            "{7a7a4a92-a2a0-41d1-9fd7-1e92480d612d}".settings = {
+              dbInChromeStorage = true; # required for Stylus
+            };
+          };
+        };
+        settings = {
+          "extensions.autoDisableScopes" = 0; # enables all extensions automatically
+          "xpinstall.signatures.required" = false;
+          "extensions.update.autoUpdateDefault" = false;
+          "extensions.update.enabled" = false;
+          "browser.search.defaultenginename" = "google";
+          "browser.search.order.1" = "google";
+
+          "signon.rememberSignons" = false;
+          "widget.use-xdg-desktop-portal.file-picker" = 1;
+          "browser.aboutConfig.showWarning" = false;
+          "browser.compactmode.show" = true;
+          "browser.cache.disk.enable" = true; # Set to false if you have a HDD
+          "browser.warnOnQuitShortcut" = false;
+          "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
+
+          # "mousewheel.default.delta_multiplier_x" = 100;
+          # "mousewheel.default.delta_multiplier_y" = 100;
+          # "mousewheel.default.delta_multiplier_z" = 100;
+
+          # Firefox 75+ remembers the last workspace it was opened on as part of its session management.
+          # This is annoying, because I can have a blank workspace, click Firefox from the launcher, and
+          # then have Firefox open on some other workspace.
+          "widget.disable-workspace-management" = true;
+        };
+        search = {
+          force = true;
+          default = "google";
+          order = [
+            "google"
+          ];
+        };
+      };
+    };
+  };
+}
diff --git a/home/browsers/firefox/userChrome.css b/home/browsers/firefox/userChrome.css
new file mode 100644
index 0000000..ac60443
--- /dev/null
+++ b/home/browsers/firefox/userChrome.css
@@ -0,0 +1,223 @@
+@media (prefers-color-scheme: light) {
+  :root {
+    /* bookmark_text */
+    --toolbar-color: #eff1f5ff !important;
+
+    /* button_background_active */
+    --toolbarbutton-active-background: rgba(156, 160, 176, 1) !important;
+
+    /* button_background_hover */
+    --toolbarbutton-hover-background: rgba(204, 208, 218, 1) !important;
+
+    /* icons */
+    --toolbarbutton-icon-fill: #4c4f69ff !important;
+
+    /* icons_attention */
+    --toolbarbutton-icon-fill-attention: #4c4f69ff !important;
+
+    /* frame */
+    --toolbox-non-lwt-bgcolor: #dce0e8ff !important;
+
+    /* frame_inactive */
+    &:where([tabsintitlebar]) {
+      --toolbox-non-lwt-bgcolor-inactive: #dce0e8ff !important;
+    }
+
+    /* popup */
+    --arrowpanel-background: #eff1f5ff !important;
+
+    /* popup_border */
+    --arrowpanel-border-color: #9ca0b0ff !important;
+
+    /* popup_highlight */
+    --urlbarView-highlight-background: #9ca0b0ff !important;
+
+    /* popup_highlight_text */
+    --urlbarView-highlight-color: #4c4f69ff !important;
+
+    /* popup_text */
+    --arrowpanel-color: #4c4f69ff !important;
+
+    /* tab_background_text */
+    --toolbox-non-lwt-textcolor: #4c4f69ff !important;
+
+    /* tab_line */
+    .tab-background[selected]:not([multiselected]) {
+      outline: 1px solid #9ca0b0ff;
+      outline-offset: -1px;
+    }
+
+    .tab-background[multiselected] {
+      --focus-outline-color: #9ca0b0ff;
+    }
+
+    /* tab_loading */
+    #tabbrowser-tabs {
+      --tab-loading-fill: #9ca0b0ff !important;
+    }
+
+    /* tab_selected */
+    --tab-selected-bgcolor: #eff1f5ff !important;
+
+    /* tab_text */
+    --tab-selected-textcolor: #4c4f69ff !important;
+
+    /* toolbar */
+    --toolbar-bgcolor: #eff1f5ff !important;
+
+    /* toolbar_bottom_separator */
+    --chrome-content-separator-color: #eff1f5ff !important;
+
+    /* toolbar_field */
+    --input-bgcolor: #e6e9efff !important;
+    --toolbar-field-background-color: var(--input-bgcolor) !important;
+
+    /* toolbar_field_border */
+    --input-border-color: #eff1f5ff !important;
+    --toolbar-field-border-color: var(--input-border-color) !important;
+
+    /* toolbar_field_border_focus */
+    --toolbar-field-focus-border-color: #6c7086ff !important;
+
+    /* toolbar_field_focus */
+    --toolbar-field-focus-background-color: #eff1f5ff !important;
+
+    /* toolbar_field_highlight */
+    #urlbar-input,
+    .searchbar-textbox {
+      &:focus::selection {
+        background-color: #6c7086ff;
+      }
+    }
+
+    /* toolbar_field_highlight_text */
+    #urlbar-input,
+    .searchbar-textbox {
+      &:focus::selection {
+        color: #eff1f5ff;
+      }
+    }
+
+    /* toolbar_field_text */
+    --input-color: #4c4f69ff !important;
+    --toolbar-field-color: var(--input-color) !important;
+
+    /* toolbar_field_text_focus */
+    --toolbar-field-focus-color: #4c4f69ff !important;
+
+    /* toolbar_vertical_separator */
+    --toolbarseparator-color: #6c7086ff !important;
+  }
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    /* bookmark_text */
+    --toolbar-color: #1e1e2eff !important;
+
+    /* button_background_active */
+    --toolbarbutton-active-background: rgba(108, 112, 134, 1) !important;
+
+    /* button_background_hover */
+    --toolbarbutton-hover-background: rgba(49, 50, 68, 1) !important;
+
+    /* icons */
+    --toolbarbutton-icon-fill: #cdd6f4ff !important;
+
+    /* icons_attention */
+    --toolbarbutton-icon-fill-attention: #cdd6f4ff !important;
+
+    /* frame */
+    --toolbox-non-lwt-bgcolor: #11111bff !important;
+
+    /* frame_inactive */
+    &:where([tabsintitlebar]) {
+      --toolbox-non-lwt-bgcolor-inactive: #11111bff !important;
+    }
+
+    /* popup */
+    --arrowpanel-background: #1e1e2eff !important;
+
+    /* popup_border */
+    --arrowpanel-border-color: #6c7086ff !important;
+
+    /* popup_highlight */
+    --urlbarView-highlight-background: #6c7086ff !important;
+
+    /* popup_highlight_text */
+    --urlbarView-highlight-color: #cdd6f4ff !important;
+
+    /* popup_text */
+    --arrowpanel-color: #cdd6f4ff !important;
+
+    /* tab_background_text */
+    --toolbox-non-lwt-textcolor: #cdd6f4ff !important;
+
+    /* tab_line */
+    .tab-background[selected]:not([multiselected]) {
+      outline: 1px solid #6c7086ff;
+      outline-offset: -1px;
+    }
+
+    .tab-background[multiselected] {
+      --focus-outline-color: #6c7086ff;
+    }
+
+    /* tab_loading */
+    #tabbrowser-tabs {
+      --tab-loading-fill: #6c7086ff !important;
+    }
+
+    /* tab_selected */
+    --tab-selected-bgcolor: #1e1e2eff !important;
+
+    /* tab_text */
+    --tab-selected-textcolor: #cdd6f4ff !important;
+
+    /* toolbar */
+    --toolbar-bgcolor: #1e1e2eff !important;
+
+    /* toolbar_bottom_separator */
+    --chrome-content-separator-color: #1e1e2eff !important;
+
+    /* toolbar_field */
+    --input-bgcolor: #181825ff !important;
+    --toolbar-field-background-color: var(--input-bgcolor) !important;
+
+    /* toolbar_field_border */
+    --input-border-color: #1e1e2eff !important;
+    --toolbar-field-border-color: var(--input-border-color) !important;
+
+    /* toolbar_field_border_focus */
+    --toolbar-field-focus-border-color: #6c7086ff !important;
+
+    /* toolbar_field_focus */
+    --toolbar-field-focus-background-color: #1e1e2eff !important;
+
+    /* toolbar_field_highlight */
+    #urlbar-input,
+    .searchbar-textbox {
+      &:focus::selection {
+        background-color: #6c7086ff;
+      }
+    }
+
+    /* toolbar_field_highlight_text */
+    #urlbar-input,
+    .searchbar-textbox {
+      &:focus::selection {
+        color: #1e1e2eff;
+      }
+    }
+
+    /* toolbar_field_text */
+    --input-color: #cdd6f4ff !important;
+    --toolbar-field-color: var(--input-color) !important;
+
+    /* toolbar_field_text_focus */
+    --toolbar-field-focus-color: #cdd6f4ff !important;
+
+    /* toolbar_vertical_separator */
+    --toolbarseparator-color: #6c7086ff !important;
+  }
+}
diff --git a/system/all.nix b/system/all.nix
index f94830c..68f6321 100755
--- a/system/all.nix
+++ b/system/all.nix
@@ -26,6 +26,7 @@
   home-manager.users.sckova = {
     imports = [
       ../home/all.nix
+      ../home/browsers/firefox/default.nix
       ../home/${config.networking.hostName}.nix
     ];
   };
diff --git a/system/browsers/firefox.nix b/system/browsers/firefox.nix
index b24c03b..f795cf4 100644
--- a/system/browsers/firefox.nix
+++ b/system/browsers/firefox.nix
@@ -1,3 +1,4 @@
+# https://discourse.nixos.org/t/declare-firefox-extensions-and-settings/36265
 { pkgs, ... }:
 
 let
@@ -15,106 +16,79 @@ in
     MOZ_GMP_PATH = "${pkgs.widevine-firefox}/gmp-widevinecdm/system-installed";
   };
 
-  programs.firefox = {
-    enable = true;
-    preferences = {
-      "widget.use-xdg-desktop-portal.file-picker" = 1;
-      "widget.gtk.global-menu.enabled" = true;
-      "widget.gtk.global-menu.wayland.enabled" = true;
-      "browser.tabs.inTitlebar" = 0;
-      "extensions.pocket.enabled" = false;
-      "extensions.screenshots.disabled" = true;
-      "browser.topsites.contile.enabled" = false;
-      "browser.formfill.enable" = false;
-      "browser.search.suggest.enabled" = false;
-      "browser.search.suggest.enabled.private" = false;
-      "browser.urlbar.suggest.searches" = false;
-      "browser.urlbar.showSearchSuggestionsFirst" = false;
-      "browser.newtabpage.activity-stream.feeds.section.topstories" = false;
-      "browser.newtabpage.activity-stream.feeds.snippets" = false;
-      "browser.newtabpage.activity-stream.section.highlights.includePocket" = false;
-      "browser.newtabpage.activity-stream.section.highlights.includeBookmarks" = false;
-      "browser.newtabpage.activity-stream.section.highlights.includeDownloads" = false;
-      "browser.newtabpage.activity-stream.section.highlights.includeVisited" = false;
-      "browser.newtabpage.activity-stream.showSponsored" = false;
-      "browser.newtabpage.activity-stream.system.showSponsored" = false;
-      "browser.newtabpage.activity-stream.showSponsoredTopSites" = false;
+  programs = {
+    firefox = {
+      enable = true;
+      languagePacks = [ "en-US" ];
 
-      "media.gmp-widevinecdm.version" = "system-installed";
-      "media.gmp-widevinecdm.visible" = true;
-      "media.gmp-widevinecdm.enabled" = true;
-      "media.gmp-widevinecdm.autoupdate" = false;
+      # ---- POLICIES ----
+      # Check about:policies#documentation for options.
+      policies = {
+        DisableTelemetry = true;
+        DisableFirefoxStudies = true;
+        EnableTrackingProtection = {
+          Value = true;
+          Locked = true;
+          Cryptomining = true;
+          Fingerprinting = true;
+        };
+        DisablePocket = true;
+        DisableFirefoxAccounts = true;
+        DisableAccounts = true;
+        DisableFirefoxScreenshots = true;
+        OverrideFirstRunPage = "";
+        OverridePostUpdatePage = "";
+        DontCheckDefaultBrowser = true;
+        DisplayBookmarksToolbar = "newtab"; # alternatives: "always" or "newtab"
+        DisplayMenuBar = "always"; # alternatives: "always", "never" or "default-on"
+        SearchBar = "unified"; # alternative: "separate"
 
-      "media.eme.enabled" = true;
-      "media.eme.encrypted-media-encryption-scheme.enabled" = true;
-    };
-    policies = {
-      DisableTelemetry = true;
-      DisableFirefoxStudies = true;
-      EnableTrackingProtection = {
-        Value = true;
-        Locked = true;
-        Cryptomining = true;
-        Fingerprinting = true;
-      };
-      DisablePocket = true;
-      DisableFirefoxAccounts = true;
-      DisableAccounts = true;
-      DisableFirefoxScreenshots = true;
-      OverrideFirstRunPage = "";
-      OverridePostUpdatePage = "";
-      DontCheckDefaultBrowser = true;
-      DisplayBookmarksToolbar = "newtab"; # alternatives: "always" or "newtab"
-      DisplayMenuBar = "always"; # alternatives: "always", "never" or "default-on"
-      SearchBar = "unified"; # alternative: "separate"
-
-      # ---- EXTENSIONS ----
-      # Check about:support for extension/add-on ID strings.
-      # Valid strings for installation_mode are "allowed", "blocked",
-      # "force_installed" and "normal_installed".
-      ExtensionSettings = {
-        # blocks all addons except the ones specified below
-        "*".installation_mode = "blocked";
-        "uBlock0@raymondhill.net" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        "plasma-browser-integration@kde.org" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/plasma-integration/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        "{7a7a4a92-a2a0-41d1-9fd7-1e92480d612d}" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/styl-us/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        "{aecec67f-0d10-4fa7-b7c7-609a2db280cf}" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/violentmonkey/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        "gdpr@cavi.au.dk" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/consent-o-matic/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        "dont-track-me-google@robwu.nl" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/dont-track-me-google1/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        "jid1-MnnxcxisBPnSXQ@jetpack" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/privacy-badger17/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        "FirefoxColor@mozilla.com" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/firefox-color/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        "sponsorBlocker@ajay.app" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/sponsorblock/latest.xpi";
-          installation_mode = "force_installed";
-        };
-        # "" = {
-        #   install_url = "https://addons.mozilla.org/firefox/downloads/latest/_/latest.xpi";
-        #   installation_mode = "force_installed";
+        # ---- EXTENSIONS ----
+        # Check about:support for extension/add-on ID strings.
+        # Valid strings for installation_mode are "allowed", "blocked",
+        # "force_installed" and "normal_installed".
+        # ExtensionSettings = {
+        #   # blocks all addons except the ones specified below
+        #   "*".installation_mode = "blocked";
         # };
+
+        # ---- PREFERENCES ----
+        # Check about:config for options.
+        Preferences = {
+          "browser.contentblocking.category" = {
+            Value = "strict";
+            Status = "locked";
+          };
+          "widget.use-xdg-desktop-portal.file-picker" = 1;
+          "widget.gtk.global-menu.enabled" = lock-true;
+          "widget.gtk.global-menu.wayland.enabled" = lock-true;
+          "browser.tabs.inTitlebar" = 0;
+          "extensions.pocket.enabled" = lock-false;
+          "extensions.screenshots.disabled" = lock-true;
+          "browser.topsites.contile.enabled" = lock-false;
+          "browser.formfill.enable" = lock-false;
+          "browser.search.suggest.enabled" = lock-false;
+          "browser.search.suggest.enabled.private" = lock-false;
+          "browser.urlbar.suggest.searches" = lock-false;
+          "browser.urlbar.showSearchSuggestionsFirst" = lock-false;
+          "browser.newtabpage.activity-stream.feeds.section.topstories" = lock-false;
+          "browser.newtabpage.activity-stream.feeds.snippets" = lock-false;
+          "browser.newtabpage.activity-stream.section.highlights.includePocket" = lock-false;
+          "browser.newtabpage.activity-stream.section.highlights.includeBookmarks" = lock-false;
+          "browser.newtabpage.activity-stream.section.highlights.includeDownloads" = lock-false;
+          "browser.newtabpage.activity-stream.section.highlights.includeVisited" = lock-false;
+          "browser.newtabpage.activity-stream.showSponsored" = lock-false;
+          "browser.newtabpage.activity-stream.system.showSponsored" = lock-false;
+          "browser.newtabpage.activity-stream.showSponsoredTopSites" = lock-false;
+
+          "media.gmp-widevinecdm.version" = "system-installed";
+          "media.gmp-widevinecdm.visible" = lock-true;
+          "media.gmp-widevinecdm.enabled" = lock-true;
+          "media.gmp-widevinecdm.autoupdate" = lock-false;
+
+          "media.eme.enabled" = lock-true;
+          "media.eme.encrypted-media-encryption-scheme.enabled" = lock-true;
+        };
       };
     };
   };