diff --git a/userContent-files/webpages/manifest.css b/userContent-files/webpages/manifest.css
new file mode 100644
index 0000000..c770aae
--- /dev/null
+++ b/userContent-files/webpages/manifest.css
@@ -0,0 +1,7 @@
+@-moz-document regexp("^moz-extension://.*manifest.json$") {
+	
+	html {
+		background: var(--primary-dark-color) !important;
+		color: var(--primary-light-color) !important;
+	}	
+}
\ No newline at end of file
diff --git a/userContent.css b/userContent.css
index f4c8909..c7dea2c 100644
--- a/userContent.css
+++ b/userContent.css
@@ -1108,6 +1108,12 @@
     filter: invert(85%) !important;
   }
 }
+@-moz-document regexp("^moz-extension://.*manifest.json$")  {
+  html {
+    background: var(--primary-dark-color) !important;
+    color: var(--primary-light-color) !important;
+  }
+}
 @-moz-document url-prefix(view-source)  {
   *|*:root {
     background-color: var(--primary-dark-color) !important;
diff --git a/userContent_imports.css b/userContent_imports.css
index d2b046e..ed70f51 100644
--- a/userContent_imports.css
+++ b/userContent_imports.css
@@ -43,4 +43,5 @@
 
 /* Import relevent website dark themes */
 @import "userContent-files/webpages/view_source.css";
-@import 'userContent-files/webpages/amo_store.css';
\ No newline at end of file
+@import 'userContent-files/webpages/amo_store.css';
+@import 'userContent-files/webpages/manifest.css';