diff --git a/flake.lock b/flake.lock
index c63a1e0..662a3b9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -65,6 +65,22 @@
         "type": "github"
       }
     },
+    "firefox-sidebery-gnome": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1711290399,
+        "narHash": "sha256-e1xuHAHgeC8EU7cAIa3XfvzgI4Y7rzyTkAt9sBsgrfc=",
+        "owner": "rafaelmardojai",
+        "repo": "firefox-gnome-theme",
+        "rev": "33015314c12190230295cff61ced148e0f7ffe1c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rafaelmardojai",
+        "repo": "firefox-gnome-theme",
+        "type": "github"
+      }
+    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -382,6 +398,7 @@
         "collabora-gtimelog": "collabora-gtimelog",
         "collabora-icon": "collabora-icon",
         "ewwsalmoomedits--eww-widgets": "ewwsalmoomedits--eww-widgets",
+        "firefox-sidebery-gnome": "firefox-sidebery-gnome",
         "home-manager": "home-manager",
         "hyprland": "hyprland",
         "nix-index-database": "nix-index-database",
diff --git a/flake.nix b/flake.nix
index a40d052..4b6fc1e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,6 +21,11 @@
       flake = false;
     };
 
+    firefox-sidebery-gnome = {
+      url = "github:rafaelmardojai/firefox-gnome-theme";
+      flake = false;
+    };
+
     home-manager = {
       url = "github:nix-community/home-manager";
       inputs.nixpkgs.follows = "nixpkgs";
diff --git a/modules/home/users/minion/default.nix b/modules/home/users/minion/default.nix
index 677ed34..45f7530 100644
--- a/modules/home/users/minion/default.nix
+++ b/modules/home/users/minion/default.nix
@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ... }:
+{ inputs, config, lib, pkgs, ... }:
 {
   options.chimera.minion.enable = lib.mkEnableOption "Enable Chimera options for minion";
 
@@ -102,6 +102,39 @@
         config.nur.repos.rycee.firefox-addons.refined-github
       ];
     };
+    programs.firefox.profiles.chimera.userChrome = ''
+      @import "${inputs.firefox-sidebery-gnome}/userChrome.css";
+
+      #TabsToolbar {
+        display: none;
+      }
+      #sidebar-header {
+        display: none;
+      }
+
+      /* Hide "Sign in to sync" */
+      #PanelUI-fxa-status {
+        display: none !important;
+      }
+      #appMenu-fxa-status2, #appMenu-fxa-separator {
+        display: none !important;
+      }
+    '';
+    programs.firefox.profiles.chimera.userContent = ''
+      @import "${inputs.firefox-sidebery-gnome}/userContent.css";
+
+      @-moz-document url("about:preferences") {
+        #category-sync { display:none!important; }
+        #category-more-from-mozilla { display:none!important; }
+      }
+    '';
+    programs.firefox.profiles.chimera.settings = {
+      "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
+      "svg.context-properties.content.enabled" = true;
+      "browser.uidensity" = 0;
+      "browser.theme.dark-private-windows" = false;
+      "widget.gtk.rounded-bottom-corners.enabled" = true;
+    };
 
     chimera.shell = {
       bash.enable = true;