Index: src/wp-admin/js/customize-controls.js
===================================================================
--- src/wp-admin/js/customize-controls.js	(revision 37080)
+++ src/wp-admin/js/customize-controls.js	(working copy)
@@ -77,7 +77,7 @@
 	 * @param {Function} [params.completeCallback]
 	 */
 	focus = function ( params ) {
-		var construct, completeCallback, focus;
+		var construct, completeCallback, focus, focusFirst;
 		construct = this;
 		params = params || {};
 		focus = function () {
@@ -90,8 +90,16 @@
 				focusContainer = construct.container;
 			}

-			// Note that we can't use :focusable due to a jQuery UI issue. See: https://github.com/jquery/jquery-ui/pull/1583
-			focusContainer.find( 'input, select, textarea, button, object, a[href], [tabindex]' ).filter( ':visible' ).first().focus();
+			// Sections can tag an element as 'focus first' to opt out of the default first input focus.
+			focusFirst = focusContainer.find( '.focus-first' ).first();
+
+			if ( 0 !== focusFirst.length ) {
+				focusFirst.focus();
+			} else {
+
+				// Note that we can't use :focusable due to a jQuery UI issue. See: https://github.com/jquery/jquery-ui/pull/1583
+				focusContainer.find( 'input, select, textarea, button, object, a[href], [tabindex]' ).filter( ':visible' ).first().focus();
+			}
 		};
 		if ( params.completeCallback ) {
 			completeCallback = params.completeCallback;
Index: src/wp-includes/customize/class-wp-customize-media-control.php
===================================================================
--- src/wp-includes/customize/class-wp-customize-media-control.php	(revision 37080)
+++ src/wp-includes/customize/class-wp-customize-media-control.php	(working copy)
@@ -196,7 +196,7 @@
 			<div class="actions">
 				<# if ( data.canUpload ) { #>
 				<button type="button" class="button remove-button">{{ data.button_labels.remove }}</button>
-				<button type="button" class="button upload-button" id="{{ data.settings['default'] }}-button">{{ data.button_labels.change }}</button>
+				<button type="button" class="button upload-button focus-first" id="{{ data.settings['default'] }}-button">{{ data.button_labels.change }}</button>
 				<div style="clear:both"></div>
 				<# } #>
 			</div>