Remove ?m=1

<script type='text/javascript'>
//<![CDATA[
(function() {
  var uri = window.location.toString();

  if (uri.indexOf("?m=1") > -1) {
    var clean_uri = uri.substring(0, uri.indexOf("?m=1"));
    window.history.replaceState({}, document.title, clean_uri);
  }
  else if (uri.indexOf("&m=1") > -1) {
    var clean_uri = uri.substring(0, uri.indexOf("&m=1"));
    window.history.replaceState({}, document.title, clean_uri);
  }
})();
//]]>
</script>

What this code does

This script removes ?m=1 or &m=1 from Blogger URLs.
In Blogger, ?m=1 means the mobile version of your site.
Using this script will always display the desktop URL, even on mobile, making the URLs cleaner.

How to use this script

Blogger Dashboard → Theme → Edit HTML.
Scroll to the very bottom of the code, just before </body>.
Save the theme and check your blog.
Now ?m=1 will be automatically removed from your URL.