cmborchert

This plugin for WordPress adds a background-size controller to the Background Image section in the WordPress Customizer.
You can access the new controller by going to Appearance > Customize from the Dashboard, and clicking on the Background Image section.
Once you’ve added your custom background image, you can set your background-image size to: 
 – “Cover”: As large as possible; fills entire view, with cropping. 
 – “Contain”: As large as possible, without cropping; fits inside of view. 
 – “100% width”: Width fits view perfectly, height may be smaller or larger than view (equivalent to css ‘100% auto’). 
 – “100% height”: Height fits view perfectly, width may be smaller or larger than view (equivalent to css ‘auto 100%’). 
 – “Inherit”: Sets background size to whatever parent element is set to (html, in this case). 
 – “Custom”: Allows you to put in your own css to be applied in the section called “CSS for background-size (if ‘custom’ selected).”
To learn more about the CSS background-size property, go to:
https://developer.mozilla.org/en-US/docs/Web/CSS/background-size 
or 
http://www.w3schools.com/cssref/css3_pr_background-size.asp
<h3>Notes</h3>
Notes: 
*The plugin works by adding styles to the body.custom-background class. If the default custom-background support has been disrupted, then this plugin will not work.

Add Background-Size to Customizer

Allows you to control the background-size of your main background image from the comfort of the customizer, using predetermined values or custom CSS.

WebShouters

WS Custom Scrollbar plugin will enable change scrollbar styles where you can change scrollbar color, border radius, scroll speed, width, hide delay & other settings.
Features
<ul>
<li>Simple installation and activation</li>
<li>Show/Hide Styled Scrollbar</li>
<li>Change Scrollbar Width</li>
<li>Change Scrollbar Scroll Speed</li>
<li>Change Scrollbar Radius</li>
<li>Change Scrollbar Background Color</li>
<li>Change Scrollbar Border Color</li>
<li>Change Scrollbar Opacity</li>
<li>Enable/Disable Scrollbar Autohide</li>
<li>All Browsers Support!</li>
</ul>
If you want more information about this plugin or another one don’t doubt to visit our website:
<a href="https://www.webshouters.com/" title="WebShouters" rel="nofollow ugc">https://www.webshouters.com/</a>
<h4>Technical Support</h4>
If any problem occurs, please contact us at <a href="mailto:support@webshouters.com" rel="nofollow ugc">support@webshouters.com</a>.

WS Custom Scrollbar

Awesome plugin

WS Custom Scrollbar plugin will enable change scrollbar styles where you can change scrollbar color, border radius, scroll speed, width.



Easy to use!

At first glance, this plugin looked easy to use, so I decided to download it. Right after activating it, I got a warning with the message 'headers already sent', but I decided to ignore it.
I customised the scrollbar, and went to my website to see the result, which made me quite upset; half my website did not load.

Even after deactivating and deleting the plugin, my website is still broken, with this script in the header:
<script type="text/javascript">
	jQuery(document).ready(function($) {
		var nice = $("html").niceScroll({
			cursorcolor: "#ffffff",
			cursorwidth: "8px",
			cursorborder:"none",
			cursorborderradius:"0px",
			background:"#092a49",
			scrollspeed :"100",
			autohidemode :false,
			cursoropacitymax:1,
			bouncescroll: true,
			smoothscroll: true
		});
	});
</script>

Horrible plugin!

WS Custom Scrollbar plugin will enable change scrollbar styles where you can change scrollbar color, border radius, scroll speed, width.

Add Background-Size to Customizer vs WS Custom Scrollbar