Код
<form action="/action_page.php" autocomplete="on">
<label for="fname">Имя:</label>
<input type="text" id="fname" name="fname"><br><br>
<label for="lname">Фамилия:</label>
<input type="text" id="lname" name="lname"><br><br>
<label for="email">Email:</label>
<input type="email" id="email" name="email" autocomplete="off"><br><br>
<input type="submit" value="Отправить">
</form>