diff --git a/alternative_user_files/userContent_no_addons.css b/alternative_user_files/userContent_no_addons.css
index 824da96..95b407c 100644
--- a/alternative_user_files/userContent_no_addons.css
+++ b/alternative_user_files/userContent_no_addons.css
@@ -603,6 +603,8 @@ url-prefix(https://discovery.addons.mozilla.org) {
   }
 }
 @-moz-document url-prefix(chrome://) {
+  #FontsDialogPane,
+  #LanguagesDialogPane,
   .windowDialog,
   dialog,
   prefpane,
diff --git a/css/userContent-files/about_pages.css b/css/userContent-files/about_pages.css
index 45a590a..9b0bdb0 100644
--- a/css/userContent-files/about_pages.css
+++ b/css/userContent-files/about_pages.css
@@ -403,6 +403,8 @@ url-prefix(https://discovery.addons.mozilla.org) {
   }
 }
 @-moz-document url-prefix(chrome://) {
+  #FontsDialogPane,
+  #LanguagesDialogPane,
   .windowDialog,
   dialog,
   prefpane,
diff --git a/userContent.css b/userContent.css
index ce21a48..509b598 100644
--- a/userContent.css
+++ b/userContent.css
@@ -603,6 +603,8 @@ url-prefix(https://discovery.addons.mozilla.org) {
   }
 }
 @-moz-document url-prefix(chrome://) {
+  #FontsDialogPane,
+  #LanguagesDialogPane,
   .windowDialog,
   dialog,
   prefpane,