Unable to select and change values from some form elements with Firefox

[Matti Järvinen]

Unable to select and change properties from:

• checkbox
• selection field

with Firefox

Example data:

<form name="test">
	<p>
		<input name="checker" type="checkbox" value="yes" />checker</p>
	<p>
		<select name="sel"><option selected="selected" value="one">one</option><option value="two">two</option></select><br />
		&nbsp;</p>
</form>

[Garry Yao]

DUP of #3069.