diff --git a/modules/programs/firefox.nix b/modules/programs/firefox.nix
index 17c64752d..7f2367eb0 100644
--- a/modules/programs/firefox.nix
+++ b/modules/programs/firefox.nix
@@ -137,7 +137,7 @@ in
             userChrome = mkOption {
               type = types.lines;
               default = "";
-              description = "Custom Firefox CSS.";
+              description = "Custom Firefox user chrome CSS.";
               example = ''
                 /* Hide tab bar in FF Quantum */
                 @-moz-document url("chrome://browser/content/browser.xul") {
@@ -153,6 +153,16 @@ in
               '';
             };
 
+            userContent = mkOption {
+              type = types.lines;
+              default = "";
+              description = "Custom Firefox user content CSS.";
+              example = ''
+                /* Hide scrollbar in FF Quantum */
+                *{scrollbar-width:none !important}
+              '';
+            };
+
             path = mkOption {
               type = types.str;
               default = name;
@@ -295,6 +305,11 @@ in
             text = profile.userChrome;
           };
 
+        "${profilesPath}/${profile.path}/chrome/userContent.css" =
+          mkIf (profile.userContent != "") {
+            text = profile.userContent;
+          };
+
         "${profilesPath}/${profile.path}/user.js" =
           mkIf (profile.settings != {} || profile.extraConfig != "") {
             text = mkUserJs profile.settings profile.extraConfig;