<p>EngineersRkool, the only time I’ve seen this behavior is when you have more than one saved account on a website. I just tried one of my stored password sites and it filled in automatically without entering any characters.</p>
<p>The most common source of what you’re describing is a wrongly entered but saved passwords. Firefox thinks you have two accounts, so it asks. Try checking your saved passwords to see if you have more than one saved login for a site if you’re finding this.</p>