diff --git a/templates/userChrome.tera b/templates/userChrome.tera
index 811a359..e789677 100644
--- a/templates/userChrome.tera
+++ b/templates/userChrome.tera
@@ -52,7 +52,7 @@ whiskers:
     background-color: #{{ mantle.hex }} !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #{{ base.hex }} !important;
   }
 
diff --git a/themes/Frappe/Blue/userChrome.css b/themes/Frappe/Blue/userChrome.css
index 9bb107d..41400a0 100644
--- a/themes/Frappe/Blue/userChrome.css
+++ b/themes/Frappe/Blue/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Flamingo/userChrome.css b/themes/Frappe/Flamingo/userChrome.css
index 9dc4aad..b8bb4ba 100644
--- a/themes/Frappe/Flamingo/userChrome.css
+++ b/themes/Frappe/Flamingo/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Green/userChrome.css b/themes/Frappe/Green/userChrome.css
index 4417a57..4a18791 100644
--- a/themes/Frappe/Green/userChrome.css
+++ b/themes/Frappe/Green/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Lavender/userChrome.css b/themes/Frappe/Lavender/userChrome.css
index defa907..016ae16 100644
--- a/themes/Frappe/Lavender/userChrome.css
+++ b/themes/Frappe/Lavender/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Maroon/userChrome.css b/themes/Frappe/Maroon/userChrome.css
index 258e563..40e23dc 100644
--- a/themes/Frappe/Maroon/userChrome.css
+++ b/themes/Frappe/Maroon/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Mauve/userChrome.css b/themes/Frappe/Mauve/userChrome.css
index c73065f..35ec0de 100644
--- a/themes/Frappe/Mauve/userChrome.css
+++ b/themes/Frappe/Mauve/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Peach/userChrome.css b/themes/Frappe/Peach/userChrome.css
index 957c57c..40d721b 100644
--- a/themes/Frappe/Peach/userChrome.css
+++ b/themes/Frappe/Peach/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Pink/userChrome.css b/themes/Frappe/Pink/userChrome.css
index 2c76702..87124be 100644
--- a/themes/Frappe/Pink/userChrome.css
+++ b/themes/Frappe/Pink/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Red/userChrome.css b/themes/Frappe/Red/userChrome.css
index 8d2b935..a744819 100644
--- a/themes/Frappe/Red/userChrome.css
+++ b/themes/Frappe/Red/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Rosewater/userChrome.css b/themes/Frappe/Rosewater/userChrome.css
index 825d29b..dfcc3be 100644
--- a/themes/Frappe/Rosewater/userChrome.css
+++ b/themes/Frappe/Rosewater/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Sapphire/userChrome.css b/themes/Frappe/Sapphire/userChrome.css
index c8e8df9..177346c 100644
--- a/themes/Frappe/Sapphire/userChrome.css
+++ b/themes/Frappe/Sapphire/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Sky/userChrome.css b/themes/Frappe/Sky/userChrome.css
index 11b0517..1a80d6a 100644
--- a/themes/Frappe/Sky/userChrome.css
+++ b/themes/Frappe/Sky/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Teal/userChrome.css b/themes/Frappe/Teal/userChrome.css
index 774b39e..bb18336 100644
--- a/themes/Frappe/Teal/userChrome.css
+++ b/themes/Frappe/Teal/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Frappe/Yellow/userChrome.css b/themes/Frappe/Yellow/userChrome.css
index fd4b97b..c8631c3 100644
--- a/themes/Frappe/Yellow/userChrome.css
+++ b/themes/Frappe/Yellow/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #292c3c !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #303446 !important;
   }
 
diff --git a/themes/Latte/Blue/userChrome.css b/themes/Latte/Blue/userChrome.css
index 96b35ea..f734469 100644
--- a/themes/Latte/Blue/userChrome.css
+++ b/themes/Latte/Blue/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Flamingo/userChrome.css b/themes/Latte/Flamingo/userChrome.css
index 03d9299..57ee2ab 100644
--- a/themes/Latte/Flamingo/userChrome.css
+++ b/themes/Latte/Flamingo/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Green/userChrome.css b/themes/Latte/Green/userChrome.css
index 410b171..51ab190 100644
--- a/themes/Latte/Green/userChrome.css
+++ b/themes/Latte/Green/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Lavender/userChrome.css b/themes/Latte/Lavender/userChrome.css
index efc4383..f7abc96 100644
--- a/themes/Latte/Lavender/userChrome.css
+++ b/themes/Latte/Lavender/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Maroon/userChrome.css b/themes/Latte/Maroon/userChrome.css
index 7bc054e..1b0c17b 100644
--- a/themes/Latte/Maroon/userChrome.css
+++ b/themes/Latte/Maroon/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Mauve/userChrome.css b/themes/Latte/Mauve/userChrome.css
index 4ada3c2..7953c77 100644
--- a/themes/Latte/Mauve/userChrome.css
+++ b/themes/Latte/Mauve/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Peach/userChrome.css b/themes/Latte/Peach/userChrome.css
index 5e84654..6273746 100644
--- a/themes/Latte/Peach/userChrome.css
+++ b/themes/Latte/Peach/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Pink/userChrome.css b/themes/Latte/Pink/userChrome.css
index 3ec637f..04fb49f 100644
--- a/themes/Latte/Pink/userChrome.css
+++ b/themes/Latte/Pink/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Red/userChrome.css b/themes/Latte/Red/userChrome.css
index 944f592..c16bdc8 100644
--- a/themes/Latte/Red/userChrome.css
+++ b/themes/Latte/Red/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Rosewater/userChrome.css b/themes/Latte/Rosewater/userChrome.css
index f76e3d9..cedd144 100644
--- a/themes/Latte/Rosewater/userChrome.css
+++ b/themes/Latte/Rosewater/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Sapphire/userChrome.css b/themes/Latte/Sapphire/userChrome.css
index 7e72c68..6783e46 100644
--- a/themes/Latte/Sapphire/userChrome.css
+++ b/themes/Latte/Sapphire/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Sky/userChrome.css b/themes/Latte/Sky/userChrome.css
index 0b692a6..93f6abb 100644
--- a/themes/Latte/Sky/userChrome.css
+++ b/themes/Latte/Sky/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Teal/userChrome.css b/themes/Latte/Teal/userChrome.css
index 927f143..14f7974 100644
--- a/themes/Latte/Teal/userChrome.css
+++ b/themes/Latte/Teal/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Latte/Yellow/userChrome.css b/themes/Latte/Yellow/userChrome.css
index d4cc7be..0e3c44c 100644
--- a/themes/Latte/Yellow/userChrome.css
+++ b/themes/Latte/Yellow/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #e6e9ef !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #eff1f5 !important;
   }
 
diff --git a/themes/Macchiato/Blue/userChrome.css b/themes/Macchiato/Blue/userChrome.css
index b9ac246..3d3fff2 100644
--- a/themes/Macchiato/Blue/userChrome.css
+++ b/themes/Macchiato/Blue/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Flamingo/userChrome.css b/themes/Macchiato/Flamingo/userChrome.css
index 9514f77..b754b23 100644
--- a/themes/Macchiato/Flamingo/userChrome.css
+++ b/themes/Macchiato/Flamingo/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Green/userChrome.css b/themes/Macchiato/Green/userChrome.css
index 8f9542b..5fd580b 100644
--- a/themes/Macchiato/Green/userChrome.css
+++ b/themes/Macchiato/Green/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Lavender/userChrome.css b/themes/Macchiato/Lavender/userChrome.css
index e7aba20..8fcf934 100644
--- a/themes/Macchiato/Lavender/userChrome.css
+++ b/themes/Macchiato/Lavender/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Maroon/userChrome.css b/themes/Macchiato/Maroon/userChrome.css
index eaee234..8297c7f 100644
--- a/themes/Macchiato/Maroon/userChrome.css
+++ b/themes/Macchiato/Maroon/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Mauve/userChrome.css b/themes/Macchiato/Mauve/userChrome.css
index 766f702..5ee55c7 100644
--- a/themes/Macchiato/Mauve/userChrome.css
+++ b/themes/Macchiato/Mauve/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Peach/userChrome.css b/themes/Macchiato/Peach/userChrome.css
index bc9694f..61149b9 100644
--- a/themes/Macchiato/Peach/userChrome.css
+++ b/themes/Macchiato/Peach/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Pink/userChrome.css b/themes/Macchiato/Pink/userChrome.css
index 1f385b9..504f11b 100644
--- a/themes/Macchiato/Pink/userChrome.css
+++ b/themes/Macchiato/Pink/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Red/userChrome.css b/themes/Macchiato/Red/userChrome.css
index 4e10f03..a720cb1 100644
--- a/themes/Macchiato/Red/userChrome.css
+++ b/themes/Macchiato/Red/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Rosewater/userChrome.css b/themes/Macchiato/Rosewater/userChrome.css
index 062eddd..4174008 100644
--- a/themes/Macchiato/Rosewater/userChrome.css
+++ b/themes/Macchiato/Rosewater/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Sapphire/userChrome.css b/themes/Macchiato/Sapphire/userChrome.css
index 786359f..8b069e8 100644
--- a/themes/Macchiato/Sapphire/userChrome.css
+++ b/themes/Macchiato/Sapphire/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Sky/userChrome.css b/themes/Macchiato/Sky/userChrome.css
index 106d1d7..e608306 100644
--- a/themes/Macchiato/Sky/userChrome.css
+++ b/themes/Macchiato/Sky/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Teal/userChrome.css b/themes/Macchiato/Teal/userChrome.css
index 6f9d949..3d24716 100644
--- a/themes/Macchiato/Teal/userChrome.css
+++ b/themes/Macchiato/Teal/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Macchiato/Yellow/userChrome.css b/themes/Macchiato/Yellow/userChrome.css
index a4cccb4..ec56cf6 100644
--- a/themes/Macchiato/Yellow/userChrome.css
+++ b/themes/Macchiato/Yellow/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #1e2030 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #24273a !important;
   }
 
diff --git a/themes/Mocha/Blue/userChrome.css b/themes/Mocha/Blue/userChrome.css
index 2c36def..0c167aa 100644
--- a/themes/Mocha/Blue/userChrome.css
+++ b/themes/Mocha/Blue/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Flamingo/userChrome.css b/themes/Mocha/Flamingo/userChrome.css
index c23f03c..d06d389 100644
--- a/themes/Mocha/Flamingo/userChrome.css
+++ b/themes/Mocha/Flamingo/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Green/userChrome.css b/themes/Mocha/Green/userChrome.css
index 7db6f67..5e37990 100644
--- a/themes/Mocha/Green/userChrome.css
+++ b/themes/Mocha/Green/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Lavender/userChrome.css b/themes/Mocha/Lavender/userChrome.css
index d43cb60..29fdbf2 100644
--- a/themes/Mocha/Lavender/userChrome.css
+++ b/themes/Mocha/Lavender/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Maroon/userChrome.css b/themes/Mocha/Maroon/userChrome.css
index e3b4c9a..4700242 100644
--- a/themes/Mocha/Maroon/userChrome.css
+++ b/themes/Mocha/Maroon/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Mauve/userChrome.css b/themes/Mocha/Mauve/userChrome.css
index e05ac07..663525a 100644
--- a/themes/Mocha/Mauve/userChrome.css
+++ b/themes/Mocha/Mauve/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Peach/userChrome.css b/themes/Mocha/Peach/userChrome.css
index 2f0b406..96d1b84 100644
--- a/themes/Mocha/Peach/userChrome.css
+++ b/themes/Mocha/Peach/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Pink/userChrome.css b/themes/Mocha/Pink/userChrome.css
index edc60aa..53ed267 100644
--- a/themes/Mocha/Pink/userChrome.css
+++ b/themes/Mocha/Pink/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Red/userChrome.css b/themes/Mocha/Red/userChrome.css
index 7997ea0..f06a3c6 100644
--- a/themes/Mocha/Red/userChrome.css
+++ b/themes/Mocha/Red/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Rosewater/userChrome.css b/themes/Mocha/Rosewater/userChrome.css
index 20ea34e..1afb334 100644
--- a/themes/Mocha/Rosewater/userChrome.css
+++ b/themes/Mocha/Rosewater/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Sapphire/userChrome.css b/themes/Mocha/Sapphire/userChrome.css
index 15315bb..786cce4 100644
--- a/themes/Mocha/Sapphire/userChrome.css
+++ b/themes/Mocha/Sapphire/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Sky/userChrome.css b/themes/Mocha/Sky/userChrome.css
index 6fac9ea..428b1ae 100644
--- a/themes/Mocha/Sky/userChrome.css
+++ b/themes/Mocha/Sky/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Teal/userChrome.css b/themes/Mocha/Teal/userChrome.css
index e71929d..b830379 100644
--- a/themes/Mocha/Teal/userChrome.css
+++ b/themes/Mocha/Teal/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }
 
diff --git a/themes/Mocha/Yellow/userChrome.css b/themes/Mocha/Yellow/userChrome.css
index 4802be6..83319d8 100644
--- a/themes/Mocha/Yellow/userChrome.css
+++ b/themes/Mocha/Yellow/userChrome.css
@@ -42,7 +42,7 @@
     background-color: #181825 !important;
   }
 
-  #urlbar-background {
+  .urlbar-background {
     background-color: #1e1e2e !important;
   }