Description

By default, Firefox adds www. just before the host domain. If you attempt to navigate to example.com. In some instances, there are different responses depending on if you have www. or not in a URL.

It is annoying when Firefox adds the www. which may cause a different/unwanted response. This is a way to stop Firefox from doing this.

Solve

  1. Navigate to Firefox Config. Such as the following within the URL bar:
about:config
  1. Search for the following string:
browser.fixup.alternate.prefix
  1. Set the value from www. => false
  2. Remember to close and restart Firefox!