id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
11121	[FF] HC mode enabled when editor loaded in hidden iframe	RichardD	Piotrek Koszuliński	"As reported in the forums:
http://ckeditor.com/forums/CKEditor/Problem-with-icons-showing-up-in-Firefox-using-thickbox

Displaying a CKeditor instance inside an iframe which is initially set to ""display:none"" incorrectly triggers the HC detection, and none of the toolbar icons show up.

This seems to be related to Firefox bug 548397 -  ""window.getComputedStyle() returns null inside an iframe with display: none"".
https://bugzilla.mozilla.org/show_bug.cgi?id=548397

Looking at ''_bootstrap.js'', line 24, the problem is obvious:

{{{
CKEDITOR.env.hc = hcDetect.getComputedStyle( 'border-top-color' ) == hcDetect.getComputedStyle( 'border-right-color' );
}}}

Since ''getComputedStyle'' is returning ''null'', this test is setting ''env.hc'' to ''true''."	Bug	closed	Normal	CKEditor 4.3.2	General	4.0	fixed	Support