diff --git a/src/content-handlers/iiif/modules/uv-contentleftpanel-module/css/styles.less b/src/content-handlers/iiif/modules/uv-contentleftpanel-module/css/styles.less
index a4ff820f3..2860d01cf 100644
--- a/src/content-handlers/iiif/modules/uv-contentleftpanel-module/css/styles.less
+++ b/src/content-handlers/iiif/modules/uv-contentleftpanel-module/css/styles.less
@@ -155,20 +155,4 @@
       }
     }
   }
-}
-.iiif-gallery-component {
-  .header {
-    input[type=range]::-moz-range-track {
-      width: 100px;
-    }
-
-    @-moz-document url-prefix() {
-      .btn {
-        &.size-up,
-        &.size-down {
-          margin-top: 4px;
-        }
-      }
-    }
-  }
-}
+}
\ No newline at end of file
diff --git a/src/content-handlers/iiif/modules/uv-shared-module/css/buttons.less b/src/content-handlers/iiif/modules/uv-shared-module/css/buttons.less
index 5f8d82322..ff1365910 100644
--- a/src/content-handlers/iiif/modules/uv-shared-module/css/buttons.less
+++ b/src/content-handlers/iiif/modules/uv-shared-module/css/buttons.less
@@ -172,3 +172,26 @@
     }
 
 }
+
+.iiif-gallery-component {
+    
+    .header {
+        .btn {
+            &.size-up,
+            &.size-down {
+                &:focus {
+                    border: 1px solid @link-color;
+                }
+            }
+        }
+
+        @supports (-moz-appearance: none) {
+            .btn {
+                &.size-up,
+                &.size-down {
+                    margin-top: 4px; 
+                }
+        }
+    }
+}
+}
\ No newline at end of file
diff --git a/src/content-handlers/iiif/modules/uv-shared-module/css/range.less b/src/content-handlers/iiif/modules/uv-shared-module/css/range.less
index eee385831..4ee2c3df1 100644
--- a/src/content-handlers/iiif/modules/uv-shared-module/css/range.less
+++ b/src/content-handlers/iiif/modules/uv-shared-module/css/range.less
@@ -1,68 +1,65 @@
 .uv {
-
-    /* WebKit */
-
-    input[type=range] {
-        -webkit-appearance: none;
-    }
-
-    input[type=range]::-webkit-slider-runnable-track {
-        width: 300px;
-        height: 5px;
-        background: @gray-light;
-        border: none;
-    }
-
-    input[type=range]::-webkit-slider-thumb {
-        -webkit-appearance: none;
-        border: none;
-        height: 16px;
-        width: 16px;
-        border-radius: 50%;
-        background: @gray;
-        margin-top: -5px;
-    }
-
-    input[type=range]:focus {
-        outline: none;
-    }
-
-    input[type=range]:focus::-webkit-slider-runnable-track {
-        background: @gray-light;
-    }
-
-    /* Firefox */
-
-    input[type=range] {
-        /*required for proper track sizing in FF*/
-        width: 300px;
-    }
-
-    input[type=range]::-moz-range-track {
-        width: 300px;
-        height: 5px;
-        background: #ddd;
-        border: none;
-    }
-
-    input[type=range]::-moz-range-thumb {
-        border: none;
-        height: 16px;
-        width: 16px;
-        border-radius: 50%;
-        background: @gray;
-    }
-
-    /*hide the outline behind the border*/
-    input[type=range]:-moz-focusring {
-        outline: 1px solid white;
-        outline-offset: -1px;
-    }
-
-    input[type=range]:focus::-moz-range-track {
-        background: #ccc;
-    }
-
+	@track-color: @gray-light;
+	@thumb-color: @gray;
+	@thumb-border: @text-color;
+    @focus-border: 2px solid @link-color;
+    @focus-track-color: lighten(@track-color, 10%);
+
+    input[type="range"] {
+		-webkit-appearance: none;
+		appearance: none;
+		background-color: transparent;
+		cursor: pointer;
+	}
+
+	/* WebKit */
+	input[type="range"]::-webkit-slider-runnable-track {
+		height: 0.25rem;
+		background-color: @track-color;
+		border: none;
+		border-radius: 999px;
+	}
+
+	input[type="range"]::-webkit-slider-thumb {
+		-webkit-appearance: none;
+		height: 1rem;
+		width: 1rem;
+		margin-top: -5px;
+		background-color: @thumb-color;
+		border: 2px solid @thumb-border;
+		border-radius: 999px;
+	}
+
+	input[type="range"]:focus::-webkit-slider-thumb {
+		margin-top: -7px;
+	}
+
+	input[type="range"]:focus::-webkit-slider-runnable-track {
+		background-color: @focus-track-color;
+		border: @focus-border;
+	}
+
+	/* Firefox */
+	input[type="range"]::-moz-range-track {
+		height: 0.25rem;
+		background-color: @track-color;
+		border: none;
+		border-radius: 999px;
+	}
+
+	input[type="range"]::-moz-range-thumb {
+		height: 1rem;
+		width: 1rem;
+		margin-top: -0.5rem;
+		background-color: @thumb-color;
+		border: 2px solid @thumb-border;
+		border-radius: 999px;
+	}
+
+	input[type="range"]:focus::-moz-range-track {
+		background-color: @focus-track-color;
+		border: @focus-border;
+	}
 
     /* IE */
 
diff --git a/src/content-handlers/iiif/modules/uv-shared-module/css/styles.less b/src/content-handlers/iiif/modules/uv-shared-module/css/styles.less
index 6492f4bad..a65737286 100644
--- a/src/content-handlers/iiif/modules/uv-shared-module/css/styles.less
+++ b/src/content-handlers/iiif/modules/uv-shared-module/css/styles.less
@@ -150,22 +150,3 @@
    }
 }
 
-.iiif-gallery-component {
-    
-    .header {
-        .btn {
-            &.size-up,
-            &.size-down {
-                &:focus {
-                    border: 1px solid @link-color;
-                }
-            }
-        }
-
-        input[type="range"] {
-            &:focus {
-                border: 2px double @link-color;
-            }
-        }
-    }
-  }