Reduce 301 redirects and HTTP requests by using HTML5’s history API to show visitors the correct, canonical URL.
WordPress uses 301 redirects to redirect URLs to their canonical version.
In cases where the non-canonical version will show the correct content,
it is possible to use the HTML5 history API to show visitors the correct
URL without the additional HTTP request.
This reduces HTTP requests, speeding up access for visitors and reducing
the load on your server.
It is strongly recommended you use this plugin in association with an
SEO plugin that adds canonical URL meta tags.
It is possible. It’s strongly recommended you use an SEO plugin that adds
canonical URL meta tags to mitigate this.
Older browsers will display the non-canonical version of the URL to the user.
The same is true for users who disable JavaScript.
There are many plugins available, two to consider are
WordPress SEO by Yoast and
All in One SEO Pack.