-moz-border-radius - show the outer part of round corner as transparent

[Marek Mänd]

When one uses CSS such like as
-moz-border-radius:5px;
border:1px solid black;
background:red;

round corner is built in Mozilla:
|FFFF
|wFFF
|WwFF
|WWWwF
------

where the W-area is painted red as the F-area,
because they are in the rectangle |_ that is said to "be red".
However this spoils the whole meaning and concept of round corners
generation via CSS.

One really should be able to give background color to the element that
has round corners, so that that background color wouldnt flood over the
corners in the area, that i have marked on my figure with W-s.

So how can I tell mozilla to make the W-area TRANSPARENT ?

If it cant be done via CSS, then the whole roundcorner concept is pretty
shortsighted.

[Marek Mänd]

Marek Mänd wrote:

When one uses CSS such like as
-moz-border-radius:5px;
border:1px solid black;
background:red;

https://bugzilla.mozilla.org/show_bug.cgi?id=24998