Make dark scroll bar in Chromium-based browsers

public/content.css

@@ -1,3 +1,7 @@
+html {
+    color-scheme: dark;
+}
+
 #previewbar {
     overflow: visible;
     padding: 0;

public/help/styles.css

@@ -1,3 +1,7 @@
+html {
+  color-scheme: dark;
+}
+
 .bigText {
   font-size: 50px;
 }

public/options/options.css

@@ -1,4 +1,8 @@
 /* Options page CSS */
+html {
+    color-scheme: dark;
+}
+
 body {
     font-family: sans-serif;
 }

public/permissions/styles.css

@@ -1,4 +1,8 @@
 /* Options page CSS */
+html {
+    color-scheme: dark;
+}
+
 body {
     font-family: sans-serif;
 }

public/popup.css

@@ -6,6 +6,10 @@
   --sb-green-bg: #077B27;
 }
 
+html {
+  color-scheme: dark;
+}
+
 #sponsorBlockPopupBody .hidden {
   display: none !important;
 }