JoshuaPack

Why choose this plugin?
<ul>
<li>404 pages not working? </li>
<li>Would you like to have a custom 404 page? </li>
<li>Would you like the 404 page to be a static page? </li>
<li>Do you need to have a WordPress CMS page as your 404 page?</li>
</ul>
This plugin does it!
This a rebel plugin that does not use WordPress’s 404 hook. It was developed for themes or plugins that cause issues with the hook itself.
For more information see FAQ page.

HTD 404

This plugin will simply allow you to point to a page to serve up if you get a 404 error. Also it marks it as 404.

Rinku Y

As it’s name, it will remove query string from static resources. Static resources are JavaScript, CSS files. It improves speed of WordPress website. And also it improves speed score in website testing tools like Pingdom, GTmetrix, PageSpeed and YSlow.
<a href="https://en.wikipedia.org/wiki/Query_string" rel="nofollow ugc">About Query Strings</a>
<h4>Benefits of removing query strings</h4>
It is a part of search engine optimization. So it will improve ranking of your website in search engines. And also it will improve speed score in website testing tools. it improves performance of your website and bring more website visitors.

WP Remove Query Strings From Static Resources

If you need support, Please create a support topic.

Plugin Support

It will remove query strings from static resources like CSS and JS files.

HTD 404 vs WP Remove Query Strings From Static Resources